Solve the system of linear equations using the Gauss-Jordan elimination method. 2x + 3y 6212 3x + (x, y. z)

Answer:

Your velocity is 10 miles per hour.

Step-by-step explanation:

This can be solved as a simple rule of three problem.

In a rule of three problem, the first step is identifying the measures and how they are related, if their relationship is direct of inverse.

When the relationship between the measures is direct, as the value of one measure increases, the value of the other measure is going to increase too.

When the relationship between the measures is inverse, as the value of one measure increases, the value of the other measure will decrease.

Here, our measures are:

- The distance you ran, in miles

- The time you spent running.

As the time increases, so does the distance, it means there is a direct relationship between the measures.

Each hour has 60 minutes. You ran 3 miles in 18 minutes. So how many miles you ran in 60 minutes?

3 miles - 18 minutes

x miles - 60 minutes

18x = 180

[tex]x = \frac{180}{18}[/tex]

x = 10 miles.

Your velocity is 10 miles per hour.

Answer:

6.75g

Step-by-step explanation:

The first step is converting everything to grams, by rules of three. Then we add.

In a rule of three problem, the first step is identifying the measures and how they are related, if their relationship is direct of inverse.

When the relationship between the measures is direct, as the value of one measure increases, the value of the other measure is going to increase too.

When the relationship between the measures is inverse, as the value of one measure increases, the value of the other measure will decrease.

Unit conversion problems, like this one, is an example of a direct relationship between measures.

First step: 0.0025kg to g

Each kg has 1000g, so:

1kg - 1000g

0.0025kg - xg

x = 1000*0.0025 = 2.5g

0.0025kg = 2.5g

Second step:  1750 mg

Each g has 1000mg, so:

1g - 1000mg

xg - 1750mg

1000x = 1750

[tex]x = \frac{1750}{1000}[/tex]

x = 1.75g

1750 mg = 1.75g

2.25g - OK

Third step: 825,000 μg to g

Each g has 1,000,000 ug, so:

1g - 1,000,000 ug

xg - 825,000 ug

1,000,000x = 825,000

[tex]x = \frac{825,000}{1,000,000}[/tex]

x = 0.25g

825,000 μg = 0.25g

Final step: adding everyting

0.25g + 2.25g + 1.75g + 2.50g = 6.75g

Taking into account the change of units,  the sum results in 7.325 g.

The rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

That is, what is intended with it is to find the fourth term of a proportion knowing the other three.  

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.

To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:

a ⇒ b

c ⇒ x

So: [tex]x=\frac{cxb}{a}[/tex]

The direct rule of three is the rule applied in this case where there is a change of units.

To perform in this case the conversion of units, you must first know that 1 kg= 1000 g, 1 mg= 0.001 g and 1 μg=1×10⁻⁶ g. So:

1 kg ⇒ 1000 g

0.0025 kg ⇒ x

So:  [tex]x=\frac{0.0025 kgx1000 g}{1 kg}[/tex]

Solving:

x= 2.5 g

So, 0.0025 kg is equal to 2.5 g.

1 mg ⇒ 0.001 g

1750 mg ⇒ x

So:  [tex]x=\frac{1750 mgx0.001 g}{1 mg}[/tex]

Solving:

x= 1.75 g

So, 1750 mg is equal to 1.75 g.

1 μg ⇒ 1×10⁻⁶ g

825000 μg ⇒ x

So:  [tex]x=\frac{825000 ugx1x10^{-6} g}{1 ug}[/tex]

Solving:

x= 0.825 g

So, 825000 μg is equal to 0.825 g.

Now you add all the values ​​in the same unit of measure:

2.5 g + 1.75 g + 2.25 g + 0.825 g= 7.325 g

Finally, the sum results in 7.325 g.

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Answer:

The rounded number is 0.06006 to the hundred-thousandths place.

Step-by-step explanation:

Consider the provided number.

0.0600609

Here we need to round the number to the nearest hundred-thousandths.

Rounding to the hundred-thousandths means that there should be maximum 5 digits after the decimal point.

Here, the provided number 0.0600609 contains 7 digit after the decimal point and we want only 5 digits after decimal. So we will remove the last 3 digit.

For this we need to round the number to the nearest hundred thousands place.

The rule of rounding a number is:

If 0, 1, 2, 3, or 4 follow the number, then no need to change the rounding digit.

If 5, 6, 7, 8, or 9 follow the number, then rounding digit rounds up by one number.

The 6th digit after the decimal is 0, so there is no need to change the rounding digit.

So, the rounded number is 0.06006 to the hundred-thousandths place.

Answer:

1. Precise

2.Both

3.Precise

5.Neither

Step-by-step explanation:

Accuracy is the closeness of a measured value to a standard value.

Precision is the closeness of two or more measurements to each other.

1.The norm is 45 sit-ups in a minute.The students did, 64, 69,65 and 67. Values are not accurate compared to standard value 45.

Values are precise

Answer--Precise

2. Average score is 89.5

  Scores are 89,93,91,87

  Values are precise i.e a difference of 2 from each score

  Values are accurate because the average score is 90 thus compared to      the known average score of 89.5 they are accurate.

Answer-Both

3. Yesterday temperature=89

   Tomorrow=88

    Next day=90

   Average =75

   Values are precise i.e. difference of ± 1°

   Values are not accurate compared to the average temperatures of 75 F

   Answer---Precise

5. The jar contained 568 pennies

   The 6 people guessed the numbers as

    735,209,390,300,1005, 689

  The values are not precise

  The values are not accurate

  Answer---Neither

Accuracy refers to the closeness of a measurement to the true value, while precision is about the repeatability of measurements. The student examples show diverse cases where results can be accurate, precise, both, or neither. Without the actual value or other measurements, assessment of accuracy and precision is often not possible.

The terms accuracy and precision have distinct meanings in science. Accuracy refers to how close a measurement is to the correct or accepted value. In contrast, precision indicates how close a set of measurements are to each other, demonstrating the consistency of the measurements.

Answer:

The upper limit of the confidence interval is 3127 $/day.

Step-by-step explanation:

With the new sample we can estimate the one-sided 95% confidence interval.

For this interval (one sided, 95% of confidence), z=1.64.

The number of observations (n) is 45 days.

The mean is 2984 and the standard deviation is 585.

We can estimate the upper limit of the confidence interval as

[tex]UL=X+z*s/\sqrt{n} \\UL = 2984 + 1.64*585/\sqrt{45}=2984+ 959.4/6.708=2984+143=3127[/tex]

Answer:

b) 3

c) 5

d) 4

e) 3

f) 3 days to 5 days

Step-by-step explanation:

Total number of conferences  = 84

Part a) We can make a pie chart to represent the distribution of number of days. The area of each sector represents the percentage of duration compared to all events. For example, the conferences that lasted 2 days occurred for 4.7619% or approximately 5% of the time.

Part b) The first quartile

The number of days for which the conferences last as per the given data in ascending order are listed below in the second image. In order to find First Quartile, we first need to find the Median. Since, total number of quantities is 84, the median will be the average of middle two values (42nd and 43rd). These values are made bold in the second image below. So median of the data is 4. Median divides the data into halves, both of which are colored separately in the image. First Quartile is the middle value of the first half. Since, values in first are 42, the middle value will be the average of central two values (21st and 22nd). These are made bold and colored red. Thus, First Quartile of the data is 3.

Part c) The third quartile

Similar to last step, the 3rd Quartile is the middle value of second half of the data. The second half of the data is colored purple. Number of values in this half are again 42, so middle value will be the average of digits at 21st and 22nd place, which comes out to be 5. Therefore, 3rd quartile is 5.

Part d) The 65th percentile.

65th percentile means, 65% of the data values are below this point. 65% of the 84 is 54.6. This means 54.6 values should be below the 65th percentile. Thus, 65th percentile occurs at 55th position. Counting from the start, the digit at 55th position comes out to be 4. So, the 65th percentile is 4.

Part e) The 40th percentile

40th percentile means, 40% of the data values are below this point. 40% of the 84 is 33.6. This means 33.6 values should be below the 40th percentile. Thus, 40th percentile occurs at 34th position. Counting from the start, the digit at 34th position comes out to be 3. So, the 40th percentile is 3.

Part f) Middle 50% of the conferences

Since, First Quartile is 25th percentile and Third Quartile is 75th percentile, in between these two Quartiles 50% of the data is present. The difference of first quartile and third quartile is known as IQR, Inter Quartile range and is a common measure of spread in stats.

Therefore, for the given data:

The middle 50% of the conferences last from 3 days to 5 days

a. The organized chart is attached below.

b. The First Quartile of the data is 3.

c. The 3rd quartile is 5.

d. The 65th percentile is 4.

e.  The 40th percentile is 3

f. The middle 50% of the conferences last from 3 days to 5 days

a. We can create a pie chart to show how many days each event lasted. Each slice of the pie represents the percentage of time that event took compared to all the events.

For example, if conferences that lasted 2 days happened for about 5% of the time, their slice in the pie chart would be around that size.

b. According to the information provided, the conferences last for a certain number of days. To find the first quartile, we first need to find the median. Since there are a total of 84 quantities, the median would be the average of the middle two values (the 42nd and 43rd values). These values are highlighted in bold in the image. So, the median of the data is 4. The median divides the data into two halves, which are shown in different colours in the image.

The First Quartile is the middle value of the first half. Since the values in the first are 42, the middle value will be the average of the central two values (21st and 22nd). These are made bold and coloured red.

Thus, the First Quartile of the data is 3.

c. Similar to the last step, the 3rd Quartile is the middle value of the second half of the data. The second half of the data is coloured purple. The number of values in this half is again 42, so the middle value will be the average of digits at 21st and 22nd place, which comes out to be 5.

Therefore, the 3rd quartile is 5.

d. 65th percentile means, 65% of the data values are below this point. 65% of the 84 is 54.6.

This means 54.6 values should be below the 65th percentile. Thus, the 65th percentile occurs at the 55th position.

Counting from the start, the digit at the 55th position comes out to be 4. So, the 65th percentile is 4.

e. 40th percentile means, 40% of the data values are below this point. 40% of the 84 is 33.6. This means 33.6 values should be below the 40th percentile.

Thus, the 40th percentile occurs at the 34th position.

Counting from the start, the digit at the 34th position comes out to be 3.

So, the 40th percentile is 3.

f. Based on the given data, we can say that the middle 50% of the conferences last between 3 days and 5 days.

As the first Quartile is the 25th percentile and the Third Quartile is the 75th percentile, in between these two Quartiles 50% of the data is present. The difference of the first quartile and the third quartile is known as IQR, Inter Quartile range and is a common measure of spread in stats.

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Answer:3 9 15 21

Step-by-step explanation:

3+6=9

9+6=15

15+6=21

or think of it as 3+3+3+3+3+3+3=21

Final answer:

Adam's number pattern starts with 3, and by adding 6 to each previous term, the first four terms are 3, 9, 15, and 21.

Explanation:

The student is asking about creating a number pattern based on a given rule. In this instance, the pattern begins with the number 3, and the rule is to add 6 to the previous term to get the next term. To determine the first four terms of Adam's pattern, we start with the number 3 and repeatedly add 6.

First term: 3 (starting number)

Second term: 3 + 6 = 9

Third term: 9 + 6 = 15

Fourth term: 15 + 6 = 21

Therefore, the first four terms of Adam's number sequence are 3, 9, 15, and 21.

Answer:

Step-by-step explanation:

If you have to choose 25 days, you have to think how many months there are.

The year has 12 months, so, if you divide 25 days /12 months =2,08333. (more than 2--> 3)

So if you happen to choose 2 of every month you have 24 days chosen, you have to pick one extra day and will add 3 to the month it belongs.

In any way you choose, you an be sure there is at least one month with 3 or more days chosen.

Answer:

40.53%

Step-by-step explanation:

[tex]Percentage Increase = \frac{New Value - Old Value}{Old Value}\times100[/tex]

Here, New Value = 960÷100,000

Old Value = 190÷ 100,000

∴ [tex]Percentage Increase = \dfrac{\frac{960}{100,000} - \frac{190}{100 ,000} }{\frac{190}{100,000}}\times100[/tex]

⇒ Percentage Increase = 40.53%

Thus, percent increase in the male incarceration rate during given period is 40.53%.

To give a dose of 40 μg of Digoxin using a solution with a concentration of 0.1 mg/mL, you should administer 0.4 mL of the solution. This is achieved by first converting the dose to the same units as the concentration, then applying the formula: Volume (mL) = Dose (mg) / Concentration (mg/mL).

To determine how many milliliters would provide a dose of 40 μg of Digoxin, we first need to convert the dose from μg to mg because the concentration provided is in mg/mL. 1 mg is equivalent to 1000 μg. Hence, 40 μg would be the same as 0.04 mg.

Since the concentration of the Digoxin solution is 0.1 mg/mL, this means that every 1 mL of the solution contains 0.1 mg of Digoxin. Therefore, the volume in milliliters that would provide a dose of 0.04 mg (or 40 μg) can be calculated by the following equation: Volume (mL) = Dose (mg) / Concentration (mg/mL).

In this case, the calculation is: Volume = 0.04 mg / 0.1 mg/mL = 0.4 mL. Therefore, 0.4 mL of the solution will provide a dose of 40 μg of Digoxin.

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To provide a dose of 40 μg using a concentration of 0.1 mg/mL, 2.5 mL of the digoxin solution is needed.

To find the volume of digoxin (Lanoxin) needed to provide a dose of 40 μg, we can use the formula:

C₁V₁ = C₂V₂

Given:

C₁ = 0.1 mg/mL (0.1 mg per 1 mL)

C₂ = 40 μg (0.04 mg)

V₂ = ? mL (unknown volume)

Rearranging the formula, we get:

V₂ = (C₁V₁) / C₂

Substituting in the given values:

V₂ = (0.1 mg/mL) / (0.04 mg) = 2.5 mL

Therefore, 2.5 milliliters of the digoxin solution would provide a dose of 40 μg.

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Answer:

1.2 grams.

Step-by-step explanation:

We have been given that an oral concentrate of sertraline hydro-chloride (Zoloft) contains 20 mg/mL of the drug.

First of all, we will find number of mg in 60 mL container of the concentrate as:

[tex]\frac{\text{20 mg}}{\text{ml}}\times \text{60 ml}[/tex]

[tex]\text{20 mg}\times 60[/tex]

[tex]\text{1200 mg}[/tex]

We know 1 gram equals 1000 mg.

[tex]\text{1200 mg}\times \frac{\text{1 gram}}{\text{1000 mg}}[/tex]

[tex]1.2\times\text{1 gram}[/tex]

[tex]1.2\text{ grams}[/tex]

Therefore, 1.2 grams of sertraline hydrochloride are in each 60-mL container of the concentrate.

Answer:

The total resistance of these three resistors connected in parallel is [tex]1.7143\Omega[/tex]

Step-by-step explanation:

The attached image has the circuit for finding the total resistance. The circuit is composed by a voltage source and three resistors connected in parallel: [tex]R_1=6\Omega [/tex], [tex]R_2=3\Omega [/tex] and [tex]R_3=12\Omega [/tex].

First step: to find the source current

The current that the source provides is the sum of the current that each resistor consumes. Keep in mind that the voltage is the same for the three resistors ([tex]R_1[/tex], [tex]R_2[/tex] and [tex]R_3[/tex]).

[tex]I_{R_1}=\frac{V_S}{R_1}[/tex]

[tex]I_{R_2}=\frac{V_S}{R_2}[/tex]

[tex]I_{R_3}=\frac{V_S}{R_3}[/tex]

The total current is:

[tex]I_S=I_{R_1}+I_{R_2}+I_{R_3}=\frac{V_S}{R_1}+\frac{V_S}{R_2}+\frac{V_S}{R_3}=\frac{R_2\cdot R_3 \cdot V_S+R_1\cdot R_3 \cdot V_S+R_1\cdot R_2 \cdot V_S}{R_1\cdot R_2\cdot R_3}[/tex]

[tex]I_S=V_S\cdot \frac{R_2\cdot R_3+R_1\cdot R_3+R_1\cdot R_2}{R_1\cdot R_2\cdot R_3}[/tex]

The total resistance ([tex]R_T[/tex]) is the source voltage divided by the source current:

[tex]R_T=\frac{V_S}{I_S}[/tex]

Now, replace [tex]I_S[/tex] by the previous expression and the total resistance would be:

[tex]R_T=\frac{V_S}{V_S\cdot \frac{R_2\cdot R_3+R_1\cdot R_3+R_1\cdot R_2}{R_1\cdot R_2\cdot R_3}}[/tex]

Simplify the expression and you must get:

[tex]R_T=\frac{R_1\cdot R_2\cdot R_3}{R_2\cdot R_3+R_1\cdot R_3+R_1\cdot R_2}[/tex]

The last step is to replace the values of the resistors:

[tex]R_T=\frac{(6\Omega )\cdot (3\Omega)\cdot (12\Omega)}{(3\Omega)\cdot (12\Omega)+(6\Omega)\cdot (12\Omega)+(6\Omega)\cdot (3\Omega)}=\frac{12}{7}\Omega=1.7143\Omega [/tex]

Thus, the total resistance of these three resistors connected in parallel is [tex]1.7143\Omega[/tex]

The total resistance of a parallel circuit with resistors of 6 ohms, 3 ohms, and 12 ohms is calculated using the parallel resistance formula, resulting in approximately 1.71 ohms.

The subject of your question falls under Physics, where we need to calculate the total resistance of a parallel circuit with three different resistors.

To find the total resistance in a parallel circuit, we use the formula:

1/Rtotal = 1/R1 + 1/R2 + 1/R3

For the given values, R1 = 6 ohms, R2 = 3 ohms, and R3 = 12 ohms. Plugging in these values:

1/Rtotal = 1/6 + 1/3 + 1/12

1/Rtotal = 2/12 + 4/12 + 1/12

1/Rtotal = 7/12

Rtotal = 12/7 ohms

Rtotal ≈ 1.71 ohms

Thus, the total resistance of the parallel circuit is approximately 1.71 ohms.

Answer:

This proof can be done by contradiction.

Let us assume that 2 - √2 is rational number.

So, by the definition of rational number, we can write it as

[tex]2 -\sqrt{2} = \dfrac{a}{b}[/tex]

where a & b are any integer.

⇒ [tex]\sqrt{2} = 2 - \dfrac{a}{b}[/tex]

Since, a and b are integers [tex]2 - \dfrac{a}{b}[/tex] is also rational.

and therefore √2 is rational number.

This contradicts the fact that √2 is irrational number.

Hence our assumption that 2 - √2 is rational number is false.

Therefore, 2 - √2 is irrational number.

By assuming 2 - √2 is rational and showing this leads to a contradiction as both a and b would have to be even, which violates the initial condition that they have no common factors other than 1, it has been proven that 2 - √2 is irrational.

To show that 2 - √2 is irrational, we shall assume the opposite, that 2 - √2 is rational, and look for a contradiction. By definition, if 2 - √2 is rational, it can be expressed as a fraction of two integers, say √2 = a/b, where a and b are integers with no common factors other than 1, and b is not zero.

We can rearrange the equation to obtain √2 = 2 - a/b. Multiplying both sides by b gives us b√2 = 2b - a. Squaring both sides of this equation gives us 2b² = (2b - a)² = 4b² - 4ab + a².

Rearranging to solve for a² gives us a² = 2b², implying that a² is an even number, and hence a must be even. Let's say a = 2k for some integer k. Substituting this back into the equation gives us (2k)² = 2b², which simplifies to 4k² = 2b², and further to 2k² = b². This implies that b² is also even, which means b is even as well.

However, this is a contradiction because we assumed that a and b have no common factors other than 1; yet, we've just shown that both must be even, so they have at least a factor of 2 in common. This contradiction shows that the assumption that 2 - √2 is rational is false, and therefore 2 - √2 must be irrational.

Answer and Step-by-step explanation:

To find the angles between the lines, we can use the formula:

tanα = |ms - mr| / | 1 + ms.mr|

where ms and mr are the linear coefficients of the lines you want to find. It always finds the smaller angle formed.

Let's find all the angles from the triangles formed.

y=x     ms = 1

y=2x   mr = 2

tanα = |1 - 2| / | 1 + 1.2|

tanα = |-1| / | 1 + 2|

tanα = |-1/3|

tanα = 1/3

α = tan⁻¹1/3

α = 18.4°

y=x     ms = 1

y=-4   mr = 0

tanα = |1 - 0| / | 1 + 1.0|

tanα = |1| / | 1 + 0|

tanα = |1/1|

tanα = 1

α = tan⁻¹1

α = 45°

y=2x     ms = 2

y=-4     mr = 0

tanα = |2 - 0| / | 1 + 2.0|

tanα = |2| / | 1 + 0|

tanα = |2/1|

tanα = 2

α = tan⁻¹2

α = 63.4°

As these 2 lines are in both triangles, the suplement of this angle is also asked, so, 180° - 63.4° = 116.6°

For y=2x and y=-4, it's the same: α = 63.4°  

y=2x     ms = 2

y=-2x     mr = -2

tanα = |2 - (-2)| / | 1 + 2.(-2)|

tanα = |4| / | 1 - 4|

tanα = |4/3|

tanα = 4/3

α = tan⁻¹ 4/3

α = 53.1°

Final answer:

To find angles ABC and ABD in the intersecting lines problem, analyze the slopes of the lines and their intersections.

Explanation:

Triangles can be formed by the intersection of lines with given equations. In this case, the lines are y=x, y= 2x, y=-2x, and y=-4. To find angles ABC and ABD, one must analyze the slopes of these lines and their intersections.

Angle ABC= arctan(∣ m2 −m 1 ∣)

Angle ABC = arctan(∣2−1∣)

Angle ABC = 45 degree

Angle ABD:

This angle is formed by the lines

Angle ABD= arctan (∣m 2 −m 1 ∣)

Angle ABD = arctan(∣−2−1∣)

Angle ABD ≈ 71.57 degree

Answer:

In the files are the truth tables.

c) and d) are the same.

The student's question is about constructing truth tables for four different logical expressions, which involves the step-by-step process of calculating the truth values based on the logical operators for conjunction, disjunction, conditional, and negation.

Constructing Truth Tables

To construct truth tables for the given logical expressions, we enumerate all the possible truth values for the propositions p, q, and r, and calculate the truth values of the complex expressions based on logical operators like conjunction (∧), disjunction (∨), conditional (⇒), and negation (¬).

a) (p ∧ q) ∨ r

This expression involves the conjunction of p and q, followed by the disjunction with r. To construct the truth table, we first list all possible binaries (true/false) for p, q, and r, then determine the result of p ∧ q, and finally the disjunction with r.

b) (p ∨ q) ⇒ (p ∧ r)

The expression starts with the disjunction of p and q, which implies (p ∧ r). Calculate the truth values step by step.

c) (p ⇒ q) ∨ (¬p ⇒ q)

Here, we have two conditional expressions connected by disjunction. The truth value of each conditional is ascertained separately, and then combined using the disjunction ∨.

d) (p ⇒ q) ∧ (¬p ⇒ q)

Similarly, for the conjunction, the truth of both conditionals must hold. Construct each column gradually, concluding with the combined result.

By following logical operators' rules and systematically filling in every row, we can complete these truth tables to see which combinations of propositions render the expressions true or false.

Answer:   0.2

Step-by-step explanation:

Let F denotes the event that graduate senior will get offer from the first company and S denotes the event that graduate senior will get offer from the second company .

Then, we have : [tex]P(F)=0.6[/tex]       [tex]P(S)=0.5[/tex]

The probability that at least one will reject him ( neither first nor second ) = [tex]P(F'\cap S')=0.8[/tex]

Now, [tex]P(F\cup S)=1-P(F'\cap S')=1-0.8=0.2[/tex]

Hence, the probability that he gets at least one offer ( either first or second)= 0.2

Answer:

2

Step-by-step explanation:

1. solve for the multiplication (3x4)= 12

2. solve for (7+9-10) take 7+9 which =16 and then subtract by 10. (16-10=6)

3. take the 12 and divide by 6

To solve the expression (3×4)÷(7+9-10), perform the operations inside the brackets first, then multiply and divide according to BODMAS/BIDMAS rules. The correct answer after simplifying is 2.

To solve the problem (3×4)÷(7+9-10), you should follow the steps of BEDMAS/BIDMAS (Brackets, Exponents/Indices, Division and Multiplication, Addition and Subtraction), also known as the order of operations.

Always remember to check the answer to see if it is reasonable by reviewing your calculation steps.

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Answer:

33 feet

22 feet

Step-by-step explanation:

Let the longer piece be x

Therefore the shorter piece is (2/3)x

x + (2/3)x  = 55                  Combine the left 2 terms.

(3/3)x + (2/3)x = 55           Add  

(5/3)x = 55                        Multiply both sides by (3/5)

(3/5) * (5/3)x = (3/5)*55

x = 33

The larger piece is 33 feet

The smaller piece is (2/3) * 33 = 22 feet

Answer:

$89.60 will be saved by purchasing $224 of cloths be at the register

Step-by-step explanation:

This problem can be solved by a rule of three.

In a rule of three problem, the first step is identifying the measures and how they are related, if their relationship is direct of inverse.

When the relationship between the measures is direct, as the value of one measure increases, the value of the other measure is going to increase too.

When the relationship between the measures is inverse, as the value of one measure increases, the value of the other measure will decrease.

In this problem, we have the following measures:

-The total money

-The percentage of money

As the percentage of money increases, so does the total money. It means that the relationship between the measures is direct.

The problem states that Shirtbarn is having a sale where everything in the store is 40% off. It means that in every purchase, you save 40% of the money.

How much will be saved by purchasing $224 of cloths be at the register?

40% of 224 will be saved. So

$224 - 1

$x - 0.4

x = 224*0.4

x = $89.60

$89.60 will be saved by purchasing $224 of cloths be at the register

Answer:

a)  1.6180339875

b) 2.7182818

Step-by-step explanation:

a) Golden ratio is the ratio that divides a quantity in such a manner that when the larger quantity is divided by the smaller quantity, it is equal to the value when the whole quantity is divided by the larger quantity. It is also known by the name golden mean or divine ratio.

It is generally denoted by [tex]\phi[/tex]

Its numeric value is: 1.6180339875

b) Approximate value of e can be calculated with the help of taylors expansion of [tex]e^x[/tex] at x = 1.

Approximate value of e upto 6 decimal places: 2.7182818

To find the mass of water that fell on the city, multiply the volume of the rainstorm by the density of water.

To calculate the amount of water that fell on the city, we first calculate the volume of water by multiplying the width, length, and height of the rainstorm. Using the given values of 1.0 cm of rain, 4 km wide, and 8 km long, we find that the volume is 1.5 × 1018 m³. Since water has a density of 1 ton per cubic meter, we can calculate the mass by multiplying the volume by the density, which gives us 1.5 × 1018 metric tons.

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Answer:

His daily fat intake is 40.824g.

His daily Vitamin D intake is 290.304 IU.

Step-by-step explanation:

The first step to solve this problem is finding the daily kcal intake of the dogs.

Each cup has 324 kcal, and he eats 3.5cups a day. So:

1 cup - 324 kcals

3.5 cups - x kcals

[tex]x = 324*3.5[/tex]

[tex]x = 1134[/tex] kcals.

His daily intake is of 1134 kcals.

The food contains 3.6 g of fat in 100 kcals of energy. what is his daily fat intake?

There are 3.6g of fat in 100 kcals of energy. How many g of fat are there in 1134 kcals?

3.6g - 100 kcals

xg - 1134 kcal

[tex]100x = 1134*3.6[/tex]

[tex]x = \frac{1134*3.6}{100}[/tex]

[tex]x = 11.34*3.6[/tex]

[tex]x = 40.824[/tex]g

His daily fat intake is 40.824g.

The food contains 25.6 IU of Vitamin D3 in 100 kcals of energy. what is his daily Vitamin D inake?

Similar logic as above.

25.6IU - 100 kcals

x IU - 1134 kcal

[tex]100x = 1134*25.6[/tex]

[tex]x = \frac{1134*25.6}{100}[/tex]

[tex]x = 11.34*25.6[/tex]

[tex]x = 290.304[/tex]IU

His daily Vitamin D intake is 290.304 IU.

Answer and Step-by-step explanation:

A = {l,m,n,o,p}

B = {o,p,q,r}

C = {r,s,t,u}

(A ∪ B) ∩ C  

(A ∪ B) = {l,m,n,o,p,q,r}

C = {r,s,t,u}

(A ∪ B) ∩ C  = {r}

A ∩ (C ∪ B)

(C ∪ B)  = {o,p,q,r,s,t,u}

A = {l,m,n,o,p}

A ∩ (C ∪ B)  = {o,p}

(A ∩ B) ∪ C

(A ∩ B) = {o,p}

C = {r,s,t,u}

(A ∩ B) ∪ C = {o,p,r,s,t,u}

At a newsstand, out of 46 customers, 27 bought the Daily News, 18 bought the Tribune, and 6 bought both papers. Use a Venn diagram to answer the following questions:

only daily news: 21 (27-6)

only tribune: 12 (18-6)

Total newspaper: 39 (21+12+6)

Other than newspapers: 7 (46 - 39)

How many customers bought only one paper? 21+12 = 33

How many customers bought something other than either of the two papers? 7

equal, equivalent, or neither.

{d,o,g}: {c,a,t}  equivalent

{run} : {{r,u,n}  equal

{t,o,p} :{p,o,t}  equal

0 = 0% probability that Saturday is the day after Wednesday.

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A probability is the number of desired outcomes divided by the number of total outcomes.

In this question, we have to consider that:

Thus, 0 = 0% probability that Saturday is the day after Wednesday.

A similar question is given at https://brainly.com/question/16763692

the correct answer is 1/7.

To determine the probability that Saturday is the day after Wednesday, let's consider the days of the week in order:

1. List the days of the week**: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.

2. Identify the position of Wednesday**: Wednesday is the 4th day of the week.

3. Determine the position of Saturday, the day after Wednesday: Saturday is the 6th day of the week.

4. Calculate the probability:

  - There are 7 days in total.

  - Wednesday is followed by Thursday, Friday, and then Saturday, making Saturday the 6th day after Wednesday.

5. Probability calculation:

  - There is only one Saturday in the week.

  - Therefore, the probability that Saturday is the day after Wednesday is [tex]\( \frac{1}{7} \).[/tex]

Answer:

Line A is represented by the function f(x) = 2x + 1.

Step-by-step explanation:

This can be solved by trial and error. What it means? It means that we are going to replace the ordered pairs in the function, and the equality must be satisfied.

Line A

(-2,-3)

When x = -2, f(x) = -3. Does it happen in the function?

[tex]f(x) = 2x + 1[/tex]

[tex]-3 = 2(-2) + 1[/tex]

[tex]-3 = -3[/tex]

The first equality is OK. Let's see the second

(2,5)

When x = 2, y = 5.

[tex]f(x) = 2x + 1[/tex]

[tex]5 = 2(2) + 1[/tex]

[tex]5 = 5[/tex]

Also OK.

So line A is represented by the function f(x) = 2x + 1.

Now let's see why the other lines are not represented by this function.

Line B

(-2,-4)

[tex]f(x) = 2x + 1[/tex]

[tex]-4 = 2(-2) + 1[/tex]

[tex]-4 = -3[/tex]

False

Line C

(-2,-5)

[tex]f(x) = 2x + 1[/tex]

[tex]-5 = 2(-2) + 1[/tex]

[tex]-5 = -3[/tex]

False

Line D

(0,-4)

[tex]f(x) = 2x + 1[/tex]

[tex]-4 = 2(0) + 1[/tex]

[tex]-4 = 1[/tex]

False

Answer:

line a

Step-by-step explanation:

Answer:

He own 200 shares of stock A and 100 shares of stock B.

Step-by-step explanation:

Let x be the number of shares of stock A and y be the number of shares of stock B.

Current value of a share of stock A = $40

Current value of a share of stock B = $60

A person has 14000 invested in stock A and stock B.

[tex]40x+60y=14000[/tex]

Divide both sides by 20.

[tex]2x+3y=700[/tex]            .... (1)

Stock B doubles in value and stock A goes up 50%, his stock will be worth 24,000.

New value of a share of stock A = $40 + (50% of 40)= $40 + $20 = $60

New value of a share of stock B = $60 × 2 = $120

[tex]60x+120y=24000[/tex]

Divide both sides by 60.

[tex]x+2y=400[/tex]            .... (2)

Solve equation (1) and (2) by elimination method.

Multiply 2 on both sides in equation (2).

[tex]2x+4y=800[/tex]       .... (3)

Subtract equation (3) from equation (1).

[tex]2x+3y-2x-4y=700-800[/tex]

[tex]-y=-100[/tex]

[tex]y=100[/tex]

The value of y is 100.

Substitute y=100 in equation (1).

[tex]2x+3(100)=700[/tex]

[tex]2x+300=700[/tex]

Subtract 300 from both sides.

[tex]2x=700-300[/tex]

[tex]2x=400[/tex]

Divide both sides by 2.

[tex]x=200[/tex]

The value of x is 200.

Therefore he own 200 shares of stock A and 100 shares of stock B.

Answer:

a) 996.6 mg

b) 498.96 mg

c) 4

d) 2

Step-by-step explanation:

Given:

Dose to be given = 10 mg/kg/day

Number of dose to be divided = 2

weight of the patient = 220 pounds

now,

1 pound = 0.453 kg

thus,

weight of the patient = 220 × 0.4536 = 99.792 kg

a) Amount of Drug patient should receive per day = dose × weight of patient

or

Amount of Drug patient should receive per day = 10 × 99.792

or

Amount of Drug patient should receive per day = 997.92 mg

b) Now, the dose is divided in to 2 per day

thus,

The amount of drug received per dose = [tex]\frac{\textup{Drug received per day}}{\textup{Number of dose per day}}[/tex]

or

The amount of drug received per dose = [tex]\frac{\textup{997.92 mg}}{\textup{2}}[/tex]

or

The amount of drug received per dose = 498.96 mg

c) weight of capsule = 250 mg

Thus,

capsules received by patient per day = [tex]\frac{\textup{Dose per day in mg}}{\textup{weight of capsule in mg}}[/tex]  

or

capsules received by patient per day = [tex]\frac{\textup{997.92}}{\textup{250}}[/tex]  

or

capsules received by patient per day = 3.99168 ≈ 4

d) Capsules to be received per dose = [tex]\frac{\textup{Amount of drug per dose in mg}}{\textup{weight of capsule in mg}}[/tex]  

or

capsules received by patient per dose = [tex]\frac{\textup{498.86}}{\textup{250}}[/tex]  

or

capsules received by patient per dose = 1.99544 ≈ 2

Answer:

D) The variable is discrete because it is countable.      

Step-by-step explanation:

Both discrete and continuous falls under the numeric category.

Discrete variables are the variable that are countable and cannot be expressed in decimal form.

Example: Tosses of a coin, Number of rooms in an house.

Continuous variables on the other hand cannot be counted, they are countable and can be expressed in the form of decimals. Its value can be expressed in the form of interval.

Example: Time, Length.

Now, number of students in a class is a discrete variable since students are countable and they cannot be expressed in decimal form.

So the correct option is D) The variable is discrete because it is countable.

Final answer:

The number of students in a class is a quantitative discrete variable because student numbers are countable and would always be a whole number.

Explanation:

The number of students in a class is a quantitative discrete variable. This is because the number of students can be counted, and would always be a whole number. There is no situation in which you could have a fraction of a student. Discrete random variables like this are countable, as opposed to continuous random variables which result from measurements and can take on any value in a range, including decimals and fractions. For instance, if we were discussing the heights of students, which can vary in continuous increments, we would be talking about a continuous variable.

Therefore, the correct option for the provided question is: D. The variable is discrete because it is countable.

Answer: Hi, first, the cannon only gives the cannonball the initial velocity, and when the cannonball is in the air, the only force acting on the ball is the gravitational force.

First, let's compute the initial velocity, if the ball is fired with angle A (measured from the ground, or +x in this case) and velocity V0. then the vector of the velocity is (cos(A)*V0, Sin(A)*V0)

now start describing all the equations.

Acceleration, we know that an object in the air will fall with acceleration g = 9.8 m/s.

then a(t) = (0, -g)

Velocity: integrating the acceleration over the time, we obtain v(t) = (0,-g*t) +C

where C is a integration constant, equal to the initial velocity. Then v(t) = (cos(A)*V0, Sin(A)*V0 - g*t)

Position; For the position we need to integrate again over time, then:

p(t)= (cos(A)*V0*t, Sin(A)*V0*t - [tex]g*\frac{t^{2} }{2}[/tex]) + K.

where again K is an integration constant, in this case the initial position, that  write it as (X0,Y0).

The height of the cannonball after 2 seconds is the y component valued in t=2

height = Y0 + Sin(A)*V0*2 - [tex]g*\frac{2^{2} }{2}[/tex].

where you can put the angle A and the initial velocity V0 to obtain the height.

Answer and Explanation:

Given : The quadratic function [tex]f(x)=-x^2+x+30[/tex]

To find : Determine the following ?

Solution :

The x -intercept are where f(x)=0,

So, [tex]-x^2+x+30=0[/tex]

Applying middle term split,

[tex]-x^2+6x-5x+30=0[/tex]

[tex]-x(x-6)-5(x-6)=0[/tex]

[tex](x-6)(-x-5)=0[/tex]

[tex]x=6,-5[/tex]

The x-intercepts are (6,0) and (-5,0).

The smallest x-intercept is x=-5

The largest x-intercept is x=6

The y -intercept are where x=0,

So, [tex]f(0)=-(0)^2+0+30[/tex]

[tex]f(0)=30[/tex]

The y-intercept is y=30.