Answer:
$240
Step-by-step explanation:
Fill in the given numbers and do the arithmetic.
[tex]m=\dfrac{12,000+12,000rt}{12t}=\dfrac{12,000+12,000\cdot 0.04\cdot 5}{12\cdot 5}\\\\m=\dfrac{14,400}{60}=240[/tex]
Keri's monthly loan payment is $240 per month.
Answer: 300 per month
Step-by-step explanation:
A metallurgist has an alloy with 16% titanium and an alloy with 30% titanium. He needs 100 grams of an alloy with 23% titanium. How much of each alloy should be mixed to attain the 100 grams of alloy with 23% titanium?
nothing grams of the alloy with 16% of titanium are needed.
Let x = amount of 16% alloy, and y = amount of 30% alloy he should use.
Mixing the alloys will result in a compound weighing x + y = 100 grams.
For each gram of the 16% alloy used, 0.16 gram of titanium is contributed; similarly, for each gram of the 30% alloy used, there's a contribution of 0.3 gram. He wants to end up with an alloy of 23% titanium, or 23 grams (23% of 100), so that 0.16x + 0.3y = 23.
Solve the system:
[tex]x+y=100\implies y=100-x[/tex]
[tex]0.16x+0.3y=23\implies 0.16x+0.3(100-x)=23\implies7=0.14x[/tex]
[tex]\implies\boxed{x=50}\implies\boxed{y=50}[/tex]
The simple interest formula is l=prt where l represents simple interest on an amount p for t years at a rate of r where r is expressed as a decimal. What is the amount of money p that will generate $40 in interest at a 10% interest rate over 5 years
Answer: $80
Step-by-step explanation:
Given : Interest amount : [tex]T=\$40[/tex]
The rate of interest : [tex]r=10\%=0.1[/tex]
Time period : [tex]t=5[/tex] years
The simple interest formula is
[tex]l=prt[/tex], where l represents simple interest on an amount p for t years at a rate of r where r is expressed as a decimal.
Substitute all the values in the formula , we get
[tex]40=p(0.1)(5)\\\\\Rightarrow\ p=\dfrac{40}{0.1\times5}=80[/tex]
Hence, the amount of money p that will generate $40 in interest at a 10% interest rate over 5 years= $80
The amount of money (p) required to generate $40 in interest at a 10% interest rate over 5 years is $80.
What is the principal needed?Given the parameters:
Simple interest l = $40
Interest rate r = 10% = 10/100 = 0.10
Time t = 5 years
To determine the amount of money (p) that will generate $40 in interest at a 10% interest rate over 5 years, we use the simple interest formula:
I = P × r × t
Solve for p:
P = I / rt
Plug in the values
P = $40 / ( 0.10 × 5 )
P = $40 / 0.5
P = $80
Therefore, the value of the principal is $80.
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HELPPPP
How would you write the following expression as a sum or difference?
Answer:
see below
Step-by-step explanation:
The applicable rules of logarithms are ...
log(a^b) = b·log(a)
log(a/b) = log(a) -log(b)
___
The expression can be rewritten as ...
[tex]\log{\dfrac{\sqrt[3]{2-x}}{3x}}=\log{\sqrt[3]{2-x}}-\log{3x}=\dfrac{1}{3}\log{(2-x)}-\log{(3x)}[/tex]
The expression can be written as a sum or difference as:
[tex]$$\boxed{\frac{1}{3} \log(2-x) - \log(3x)}$$[/tex]
How would you write the following expression as a sum or difference?To write the expression [tex]$\log(\frac{\sqrt[3]{2-x}}{3x})$[/tex] as a sum or difference, we can use the following logarithmic identities:
[tex]$\log(a/b) = \log(a) - \log(b)$[/tex]
[tex]$\log(a^n) = n \log(a)$[/tex]
First, we can use the first identity to split the logarithm of the fraction into two logarithms:
[tex]$$\log(\frac{\sqrt[3]{2-x}}{3x}) = \log(\sqrt[3]{2-x}) - \log(3x)$$[/tex]
Next, we can use the second identity to expand the logarithm of the cube root:
[tex]$$\log(\sqrt[3]{2-x}) = \log((2-x)^{1/3}) = \frac{1}{3} \log(2-x)$$[/tex]
Substituting this back into the first expression, we get:
[tex]$$\log(\frac{\sqrt[3]{2-x}}{3x}) = \frac{1}{3} \log(2-x) - \log(3x)$$[/tex]
Therefore, the expression can be written as a sum or difference as:
[tex]$$\boxed{\frac{1}{3} \log(2-x) - \log(3x)}$$[/tex]
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Which of the following is true about indexes and scales?
a. They are nominal measures of variables.
b. They rank-order the units of analysis in terms of specific variables.
c. Their attributes form an intensity structure.
d. They are ordinal measures of variables They are interval measures.
Answer: The following statement is true about indexes and scales: They rank-order the units of analysis in terms of specific variables.
Indexes provides with a way to make a complex measure that iterate consequence for multiple rank-ordered related questions or statements.
Scale is a type of complex measurement that is combined of several items that have a empirical structure among them.
A security alarm requires a four digit code the code can use the digits 0-9 and the digits cannot be repeated what is the approximate probability that the code contains only odd numbers
Answer:
Probability = 0.2381
Step-by-step explanation:
A security alarm requires a four digit code by using 0 - 9 and the digits cannot be repeated.
First we calculate how many codes can be made.
Combination = [tex]^{n}p_{r}[/tex]
Where n = 10 and r = 4
[tex]^{n}p_{r}[/tex] = [tex]\frac{10!}{(10-4)!}[/tex]
= [tex]\frac{10!}{6!}[/tex]
= 10 × 9 × 8 × 7
= 5,040 combinations.
Now we have to find the probability that the code contains only odd numbers. So in 0-9 the odd numbers are = 1, 3, 5, 7, 9
There are 5 odd numbers and we have to make a code of 4 numbers.
Therefore, On first place there are 5 options and in second place 4 options, in third place there are 3 options and in fourth place we have only 2 options.
5 × 4 × 3 × 2 = 120 combinations.
Total combinations of odd numbers are 120.
Then the probability that the code contains only odd numbers is
[tex]p=\frac{120}{5040}[/tex] = 0.0238095 ≈ 0.02381
Probability = 0.2381
The approximate probability that the code contains only odd numbers is 0.0238.
Explanation:The probability of the code containing only odd numbers can be found by determining the number of possible combinations of four odd digits out of the total number of possible combinations of four digits.
To calculate this, we first count the number of odd digits from 0 to 9, which is 5. Then, we determine the number of combinations of 4 digits that can be formed from the 5 odd digits, which is 5C4 or 5.
The total number of possible combinations of four digits without repetition is 10C4 or 210. Therefore, the probability of the code containing only odd numbers is 5/210 or approximately 0.0238.
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Please assist me with this problem.
Answer:
4
(We didn't even need to use (9,6) )
Step-by-step explanation:
The slope-intercept form a line is y=mx+b where m is the slope and b is the y-intercept.
We are given the line we are looking for has the same y-intercept as x+2y=8.
So if we put x+2y=8 into y=mx+b form we can actually easily determine the value for b.
So we are solving x+2y=8 for y:
x+2y=8
Subtract x on both sides:
2y=-x+8
Divide both sides by 2:
y=(-x+8)/2
Separate the fraction:
y=(-x/2)+(8/2)
Reduce the fractions (if there are any to reduce):
y=(-x/2)+4
Comparing this to y=mx+b we see that b is 4.
So the y-intercept is 4.
Again since we know that the line we are looking for has the same y-intercept, then the answer is 4 since the question is what is the y-intercept.
4
A pool was sprayed with insecticide, and 2,400 mosquitoes were killed on the first day, 600 on the second day, 150 on the third day, and so on. What number of mosquitoes was killed on the sixth day after the spraying? (Round the answer to the nearest whole number.)
Answer:
2.
Step-by-step explanation:
is a geometric progression with common ratio of 1/4.
there, multiple 150 by 1/4 in 3 places. (4th, 5th and 6th day)
150 ÷ (4*4*4) = 150/64 = 2.3 ≈ 2
Using the formula for the n-th term of a geometric sequence, the number of mosquitoes killed on the sixth day is found to be approximately 2 when rounded to the nearest whole number.
The sequence representing the number of mosquitoes killed after spraying insecticide appears to decrease by a factor of 4 each day.
This pattern can be described as a geometric sequence. To find the number of mosquitoes killed on the sixth day, we will use the formula for the n-th term of a geometric sequence, which is an = a₁ × rⁿ⁻¹, where a1 is the first term, r is the common ratio, and n is the term number.
Day 1 (first term, a1): 2400 mosquitoes
Day 2: 2400 / 4 = 600 mosquitoes
Day 3: 600 / 4 = 150 mosquitoes
From this pattern, we identify the common ratio r as 1/4. To find the number of mosquitoes killed on the sixth day:
Let n = 6 for the sixth day.
Substitute a1 = 2400 and r = 1/4 into the formula: a6 = 2400 × (1/4)⁶⁻¹ = 2400 × (1/4)⁵.
Calculate the value: a6 = 2400 × (1/1024) ≈ 2.34, which rounds to 2 mosquitoes when rounded to the nearest whole number.
Therefore, approximately 2 mosquitoes were killed on the sixth day after the spraying.
If two lines are perpendicular, their slopes are negative reciprocals.
Answer:
true
Step-by-step explanation:
yes, that is true. Parallel lines have equal slopes and perpendicular lines have negative reciprocal slopes (or opposite reciprocals, the "opposite" being the sign).
The statement "If two lines are perpendicular, their slopes are negative reciprocals." is: True
What is the slope of perpendicular lines?The general form for the equation of a line in slope intercept form is:
y = mx + c
where:
m is slope
c is y-intercept
We know that when two lines are parallel, that their slopes are the same. However, when two lines are perpendicular, then their slopes are negative reciprocals of each other.
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Please Help I don't understand how to do this!
Answer:
c. Look at the first 7 digits in the table. Let digits from 0 to 3 ...
Step-by-step explanation:
The digits in a random number table are intended to be uniformly distributed, so that each digit has a probability of 0.1. By using combinations of digits you can fairly easily define an outcome that has a probability that is a multiple of 0.1.
Here, you want a probability of 40% = 0.4 = 4×0.1. By defining your outcome as any of 4 digit values, (0 to 3, for example), that outcome will have a probability of 0.4 = 40% when a digit is randomly chosen.
To choose the correct answer here, you only need to understand the above, then choose the answer choice that has an outcome that is defined as 4 of the digits.
___
By looking at 7 digits, you effectively run a simulation in which you do the trial 7 times. Here, you're buying 7 boxes of cereal, so you're interested in 7 trials, each with a probability of success of 40%. This further confirms that the answer choice should include the wording "look at the first 7 digits."
___
More explanation
If the first digit is a number 0-3, it means you got a toy in the first box of cereal.
If the second digit is a number 0-3, it means you got a toy in the second box of cereal.
...
If the 7th digit is a number 0-3, it means you got a toy in the 7th box of cereal.
By counting the number of digits of the first 7 digits that are in the range 0-3, you are effectively counting the number of toys you got in those 7 boxes of cereal.
For example, if the first 7 digits of the table are 9656369*, there is only 1 digit in the range 0-3. That means this purchase of 7 boxes of cereal resulted in 1 toy.
_____
In order to answer Lydia's question, many groups of 7 digits would need to be evaluated, and the ratio of 2-toy purchases to total purchases computed from those results. A trial involving 7000 digits resulted in 268 purchases out of 1000 that had exactly 2 toys, for an experimental probability of 26.8%. Using the binomial distribution, the theoretical probability is about 26.1%--a fairly good match.
___
* this number was generated by random [dot] org
The graph of a limacon curve is given. Without using your graphing calculator, determine which equation is correct for the graph.
r = 2 + 2 sin θ
r = 3 + 2 sin θ
r = 1 + 3 sin θ
r = 3 + sin θ
Answer:
r = 3 + sin(θ)
Step-by-step explanation:
The curve extends below the x-axis, so the added constant must be larger than the coefficient of the sine function. There are two choices matching that description.
The extent in the -y (θ=-π/2) direction looks to be about 2/3 of the extent in the +x (θ=0) direction, so we expect the appropriate equation is ...
r = 3 + sin(θ)
Find the GCF of the following numbers:
2^5 x 3^7 and 2^7 x 3^5
Answer = 2^? x 3^? AKA 2 to the power of what multiplied by 3 to the power of what
13 POINTS! NEED ANSWER QUICK! THANKS!
Answer:
[tex]2^53^5[/tex]
Step-by-step explanation:
So if we compare [tex]2^5 \cdot 3^7[/tex] to [tex]2^7 \cdot 3^5[/tex], we should see the most amount of factors of 2 that they have in common is 5 and the most amount of factors of 3 that they have in common is 5.
If you aren't sure on the number of factors of 2 and 3 they have in common you could write it all out:
[tex]2^53^7=(2)(2)(2)(2)(2)\cdot\text{ }(3)(3)(3)(3)(3)(3)(3[/tex]
[tex]2^73^5=(2)(2)(2)(2)(2)(2)(2)\text{ }(3)(3)(3)(3)(3)[/tex]
So if I were able to circle each pair of 2's they had in common I would circle 5 pairs.
If were able to circle each pair of 3's they had in common I would circle 5 pairs.
Mike entered a science fair and needs to show the growth of his hybrid tomato plant over a three-month period. Which type of chart would best display this data?
A line graph would be the best type of chart to display the growth of Mike's hybrid tomato plant over a three-month period.
Explanation:The type of chart that would best display the growth of Mike's hybrid tomato plant over a three-month period is a line graph. A line graph is suitable for showing the changes in a variable over time, making it ideal for displaying the growth of the tomato plant.
The length of a rectangle is 4 m less than the diagonal and the width is 5 m less than the diagonal. If the area is 82 m^2, how long is the diagonal in meters? Round your answers to the nearest tenth.
I hate rounding.
Let's call the diagonal x. It's the hypotenuse of the right triangle whose legs are the rectangle sides.
According to the problem we have a length x-4 and a width x-5 and an area
82 = (x-4)(x-5)
82 = x^2 - 9x + 20
0 = x^2 - 9x - 62
That one doesn't seem to factor so we go to the quadratic formula
[tex]x = \frac 1 2(9 \pm \sqrt{9^2-4(62)}) = \frac 1 2(9 \pm \sqrt{329})[/tex]
Only the positive value makes any sense for this problem, so we conclude
[tex]x = \frac 1 2(9 \pm \sqrt{329})[/tex]
That's the exact answer. Did I mention I hate rounding? That's about
x = 13.6 meters
Answer: 13.6
----------
It's not clear to me this problem is consistent. By the Pythagorean Theorem the diagonal satisfies
[tex]x^2 = (x-4)^2 + (x-5)^2[/tex]
which works out to
[tex]x=9 \pm 2\sqrt{10}[/tex]
That's not consistent with the first answer; this problem really has no solution. Tell your teacher to get better material.
To find the length of the diagonal, we can use the formula for the area of a rectangle and quadratic equation. By substituting the given values and solving for D, we can find the length of the diagonal.
Explanation:To solve this problem, we can use the formula for the area of a rectangle: length * width = area. Let's represent the length of the rectangle as L, the width as W, and the diagonal as D. According to the problem, L = D - 4 and W = D - 5, and the area is given as 82 m2. We can substitute these values into the formula and solve for D.
L * W = area
(D - 4) * (D - 5) = 82
Expanding and rearranging the equation, we get:
D2 - 9D - 82 = 0
Next, we can solve this quadratic equation either by factoring or by using the quadratic formula. After finding the value of D, we can round it to the nearest tenth to obtain the length of the diagonal.
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The city of Odessa, Texas is building a wheelchair ramp to make their courthouse accessible for persons in a wheel chair. The Americans with Disabilities Act (ADA) requires that a wheelchair ramp have an angle of elevation of 4.8°. The ADA guidelines also allow a maximum run of 30 feet of ramp before installing a rest platform. At the Odessa courthouse, the ramp must rise 2.5 feet to reach the top of the steps. Will they have to install a rest platform on their ramp?
Answer:
No they will not have to install a rest platform.
The ramp will be 29.88 feet long so they will not have to install a rest platform.
Step-by-step explanation:
The yearly profit or loss for a clothing store is shown for a period of three years. Use a calculator to determine the clothing strore’s overall profit or loss in the three years.
Answer:
loss of $12,481.38
Step-by-step explanation:
It is usually a good idea to follow directions. (See attached.)
The sum of the three profit values is -$12,481.38, indicating a loss in the 3-year period.
Pizza delivery times at Pizza Time are normally distributed with a mean time of 27 minutes and a standard deviation of 3 minutes. Using the empirical rule, approximately what percent of pizzas are delivered between 24 and 30 minutes?
32%
68%
95%
99.7%
Answer: Second Option
68%
Step-by-step explanation:
First we calculate the Z-scores
We know the mean and the standard deviation.
The mean is:
[tex]\mu=27[/tex]
The standard deviation is:
[tex]\sigma=3[/tex]
The z-score formula is:
[tex]Z = \frac{x-\mu}{\sigma}[/tex]
For x=24 the Z-score is:
[tex]Z_{24}=\frac{24-27}{3}=-1[/tex]
For x=30 the Z-score is:
[tex]Z_{30}=\frac{30-27}{3}=1[/tex]
Then we look for the percentage of the data that is between [tex]-1 <Z <1[/tex] deviations from the mean.
According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of pizzas are delivered between 24 and 30 minutes
The sum of three numbers is 62. The second number is equal to the first number diminished by 4. The third number is four times the first. What are the numbers?.
Answer:
11, 7, 44
Step-by-step explanation:
Let x represent the first number. Then the second is (x-4) and the third is (4x). Their sum is ...
x +(x -4) +(4x) = 62
6x = 66 . . . . . . . . . . . . add 4, collect terms
x = 11 . . . . . . . . . divide by 6
x -4 = 7 . . . . . . . find the second number
4x = 44 . . . . . . . find the third number
The three numbers are 11, 7, and 44.
Are the two figures congruent?
No, because all of the corresponding sides are unequal.
Yes, because AB = A’B’.
No, because the reflection of ABC is not congruent to A’B’C’.
Yes, because they are reflections of each other.
Answer:
No, because the reflection of ABC is not congruent to A’B’C’.
Step-by-step explanation:
we know that
The rule of the reflection across the line y=x is equal to
(x,y) -------> (y,x)
so
A(-6,6) -------> A'(6,-6) ----> is ok
B(-3,3) ------> B'(3,-3) ----> is ok
C(-8,2) ------> C'(8,-2) ----> is not ok ( is not a reflection acros the line y=x)
therefore
The triangles are no t congruent, because the reflection of ABC is not congruent to A’B’C’
Subtract: (x^2 - 8x + 5)-(-3x^2 + 5x-9)
Answer: 4x^2 -13x + 14
Step-by-step explanation:
(x^2 - 8x + 5)-(-3x^2 + 5x-9)
Subtract -3x^2 from x^2
(4x^2 - 8x + 5)-(5x-9)
Subtract 5x from -8x
(4x^2 -13x + 5)-(-9)
Subtract 9 from 5
4x^2 -13x + 14
Each sister bought a gift for their mom. Maggie spent 3 times as much as Karen. Karen spent half as much as Jasmine. Altogether, they spent $60. Then, solve your equation to determine how much each sister spent on their gift.
Will mark the brainliest!
Answer:
Karen spent $10, Maggie spent $30 and Jasmine spent $20
Step-by-step explanation:
let's call Karen's money spent 'x'
Maggie therefore is 3x
And Jasmine is 2x
6x=$60
x=$10
Now we substitute this back in
so Karen spent $10
Maggie spent $30
And Jasmine spent $20
Drag the tiles to the correct boxes to complete the pairs.
Match the subtraction expressions to their correct answers.
Answer:
Each part is solved and working is shown
Step-by-step explanation:
1)
[tex]-6\displaystyle\frac{4}{9}-3\displaystyle\frac{2}{9}-8\displaystyle\frac{2}{9}\\\\= -\displaystyle\frac{58}{9}-\displaystyle\frac{29}{9}-\displaystyle\frac{74}{9}\\\\= -\displaystyle\frac{161}{9}\\=-17\displaystyle\frac{8}{9}[/tex]
2)
[tex]-12.48-(-2.99) -5.62\\=-12.48 + 2.99 -5.62 \\=-15.11[/tex]
3)
[tex]-19\displaystyle\frac{2}{9}-4\displaystyle\frac{1}{9}+3\displaystyle\frac{4}{9}\\\\= -\displaystyle\frac{173}{9}-\displaystyle\frac{37}{9}+\displaystyle\frac{31}{9}\\\\= -\displaystyle\frac{179}{9}\\=-19\displaystyle\frac{8}{9}[/tex]
4)
[tex]-353.92 - (-283.56) - 131.29\\= -353.92 + 283.56 - 131.29\\= -201.65[/tex]
5)
[tex]83\displaystyle\frac{1}{5}-108\displaystyle\frac{2}{5} + 99\displaystyle\frac{1}{5}\\\\= \displaystyle\frac{416}{5}-\displaystyle\frac{542}{5}+\displaystyle\frac{496}{5}\\\\= -\displaystyle\frac{370}{5}\\= 74[/tex]
Answer:
Step-by-step explanation:
Help me on Geometry!!!
Pizza delivery times at Pizza Time are normally distributed with a mean time of 27 minutes and a standard deviation of 3 minutes. Using the empirical rule, approximately what percent of pizzas are delivered between 24 and 30 minutes?
Answer:
68% of the pizzas are delivered between 24 and 30 minutes
Step-by-step explanation:
First we calculate the Z-scores
We know the mean and the standard deviation.
The mean is:
[tex]\mu=27[/tex]
The standard deviation is:
[tex]\sigma=3[/tex]
The Z-score formula is:
[tex]Z = \frac{x-\mu}{\sigma}[/tex]
For [tex]x=24[/tex] the Z-score is:
[tex]Z_{24}=\frac{24-27}{3}=-1[/tex]
For [tex]x=30[/tex] the Z-score is:
[tex]Z_{30}=\frac{30-27}{3}=1[/tex]
Then we look for the percentage of the data that is between [tex]-1 <Z <1[/tex] deviations from the mean.
According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of the pizzas are delivered between 24 and 30 minutes
Using the empirical rule, approximately 68% of pizzas are delivered between 24 and 30 minutes, as this range falls within one standard deviation of the mean delivery time, which is normal distribution practice.
The question is about the percentage of pizzas delivered within a certain time frame, assuming a normal distribution of delivery times. The empirical rule, also known as the 68-95-99.7 rule, states that for a normal distribution:
Approximately 68% of the data falls within one standard deviation of the mean.Approximately 95% of the data falls within two standard deviations of the mean.Approximately 99.7% of the data falls within three standard deviations of the mean.In this case, the mean delivery time is 27 minutes and the standard deviation is 3 minutes. Thus, using the empirical rule, about 68% of pizzas should be delivered between 24 minutes (27 - 3) and 30 minutes (27 + 3).
In the diagram, transversal t cuts parallel lines a and b. Which equation is necessarily true?
A.
m∠1 = m∠7
B.
m∠3 = m∠6
C.
m∠5 + m∠8 = 90°
D.
m∠6 + m∠7 = 180°
Answer:
The correct answer is option B.
m<3 = m<6
Step-by-step explanation:
From the figure we an see that, a and b are parallel lines and line t is the traversal on the lines.
To find the correct option
From the given figure we get
Corresponding angles are,
<1 & <5, <2&<6, <2&<7 and <4 &<8
Alternate interior angles are,
<3 & <6 and <4 &<5
Alternate interior angles are equal.
m<3 = m<6
Therefore the correct answer is optionB
Use point slope formula to find the equation perpendicular to y=-2x+9 passing through the points (0,7)
Answer:
y-7 = 1/2x point slope form
y = 1/2x+7 slope intercept form
Step-by-step explanation:
y=-2x+9
This equation is in the form y= mx +b so the slope is -2
We want a line perpendicular
Take the negative reciprocal
m perpendicular is - (-1/2)
m perpendicular = 1/2
We have a slope of 1/2 and a point. We can use point slope form
y-y1 = m(x-x1)
y-7 = 1/2(x-0) point slope form
y-7 = 1/2x
Adding 7 to each side
y-7+7 =1/2x +7
y = 1/2x+7 slope intercept form
I need help with this problem.
Answer: y = -1/4x - 4
Step-by-step explanation:
y = (-1/4)x + 2 (This is the first linear function.)
(4,3) has slope of (-1/4)x or (1/-4)x
4(y2) - 4(y1= the new y -1(x2) -3(x1) = new x which leads to (0,-4) so y-intercept = -4
so all in all, y = (-1/4)x -4 is the answer
Hopefully, you're able to understand this. It's difficult to explain through typed words rather than visually and through a written example.
Same y intercept as x+4y=8 through (4,3)
Y intercept is when x=0, so 4y=8, so y=2 and the y intercept is (0,2)
Answer for y intercept: (0,2)
So we need the line through (0,2) and (4,3). Point-point form says the line through (a,b) and (c,d) is
(c-a)(y-b) = (d-b)(x-a)
(4 - 0)(y - 2) = (3 - 2)(x - 0)
4y - 8 = x
Answer for the line: x - 4y = -8
Check:
(0,2) is on the line: 0-4(2) = -8 check
(4,3) is on the line 4 - 4(3) = -8 check
The city of Austin is erecting a radio tower to boost cell phone coverage. They must install guy wires to support the tower in the wind. The guy-wires must attach to the tower at a point 56 feet above the base of the tower, and must form a 50° angle with the ground. Assuming that the tower is on level ground, how far from the base of the tower will the guy-wires be secured to the ground?
Answer:
47 ft
Step-by-step explanation:
The base of the tower, the guy-wires be secured to the ground will be 73.1 feet.
What are trigonometric identities?Trigonometric identities are the functions that include trigonometric functions such as sine, cosine, tangents, secant, and, cot.
Sinθ = a/b
Where θ = angle to the horizontal, a = Height of the tower, and b = length of the wire.
Also, b = a/sinθ
Given: a = 56 feet, θ = 50°
Substitute these values into equation;
b = 56 /sin 50°
b = 56/0.766
b = 73.1 feet
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Find the cosine of angle Z
Answer:
[tex]cosZ=\frac{3}{5}[/tex]
Step-by-step explanation:
Cos of an angle by definition of its ratio is side adjacent/hypotenuse. The side adjacent to angle Z cannot be the hypotenuse, so it has to be 6. The hypotenuse is 10. Therefore,
[tex]cosZ=\frac{6}{10}=\frac{3}{5}[/tex]
A rectangular dartboard has an area of 648 square centimeters. The triangular part of the dartboard has an area of 162 square centimeters. A dart is randomly thrown at the dartboard. Assuming the dart lands in the rectangle, what is the probability that it lands inside the triangle? To the nearest whole percent, the probability is
Answer: 25%
Step-by-step explanation:
Given : A rectangular dartboard has an area of 648 square centimeters.
The triangular part of the dartboard has an area of 162 square centimeters.
If we assume that the dart lands in the rectangle, then the probability that it lands inside the triangle will be :-
[tex]\dfrac{\text{Area of triangular part}}{\text{Area of rectangular dart board}}\\\\=\dfrac{162}{648}=0.25[/tex]
In percent, [tex]0.25\times100=25\%[/tex]
Hence, the required probability = 25%
The number N = 100 + 100^2 + 100^3 + ... + 100^n . Find the least possible value of n such that the number N is divisible by 11. NEED QUICKLY! Thanks!!!
Answer:
n = 11
Step-by-step explanation:
100 mod 11 = 1, which is the remainder from division by 11 for each of the terms of the sum. 11 terms of the sum are needed in order to make the remainders add up to a number divisible by 11.