How many solutions does this system have?

It will take John 2800 steps to walk from his house to James' house

Step-by-step explanation:

First of all we have to convert all the measurements in same unit.

Distance = 0.7 km

As 1 km = 1000 m

0.7*100 = 700m

And

1 m = 100 cm

700*100 = 70000cm

Now,

25 cm = 1 step

[tex]So,\\70000cm = \frac{70000}{25}\\=2800\ steps[/tex]

It will take John 2800 steps to walk from his house to James' house

Keywords: Conversions, Lengths

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Answer:

The pattern is that the decimal point moves the same number of decimal points to the right as zeros the power of ten has.

Step-by-step explanation:

To multiply a decimal number by a power of ten (such as 10, 100, 1,000, etc.), count the number of zero in the power of ten. Then go to the right the decimal point the same number of positions.

For example, 0.36 * 10 = 3.6. The multiplier 10 has one zero, so you move the decimal point in 0.36 one position to the right to get the product 3.6.

A second example, 0.36 * 100 = 36. The multiplier 100 has two zeros, so you move the decimal point in 0.36 two positions to the right to get the product 36.

So, the pattern is that the decimal point moves the same number of decimal points to the right as zeros the power of ten has.

Answer:

To multiply a decimal number by a power of ten (such as 10, 100, 1,000, etc.), count the number of zero in the power of ten. Then go to the right the decimal point the same number of positions.

Step-by-step explanation:

Answer:

yes

Step-by-step explanation:

In order to be a function, x values should not be repeated.

For example. (0,2) and (2, 2) would work.

(0,2) and (0,8) would not because there are two values for 0.

In this case, each x-value (0, 2, 7, and 9) are only used once so it is a function

Answer:

yes

Step-by-step explanation:

For this relation to be a function

Each value of x from the domain ( values on left ) must map to exactly one value of y in the range ( values on right )

Here

0 → 11

2 → 9

7 → 4

9 → 2

This is the case here thus represents a function

Answer:

A on edge

Step-by-step explanation:

Answer:

Plug in the Pythagorean Theorem and you get 5[tex]\sqrt{3}[/tex]

Step-by-step explanation:

We know that 5 is half of ten, so square those two.

a+25=100

a=75

[tex]\sqrt{75}[/tex]=5[tex]\sqrt{3}[/tex]

The answer is A, 5[tex]\sqrt{3}[/tex].

Hope this helps :)

Hello,

Much love for using Brainly Today.

We need to simplify the fraction, once done you solve it from there. It's the main step, when you're done figure out who made a mistake (if someone does) and fix it.

Here's a reminder on how to simplify a fraction,

Find a common factor of the numerator and denominator. A common factor is a number that will divide into both numbers evenly. Two is a common factor of 4 and 14.

Divide both the numerator and denominator by the common factor.

Repeat this process until there are no more common factors.

The fraction is simplified when no more common factors exist.

Another method to simplify a fraction

Find the Greatest Common Factor (GCF) of the numerator and denominator

Divide the numerator and the denominator by the GCF

Thanks again for using Brainly,

Have an amazing day!

Answer:

The vertex of the function is (2, -3).

Step-by-step explanation:

Given:

[tex]y=x^{2}-4x+1[/tex]

So, to find the vertex of the function we will get the equation in the form:

[tex]y=ax^{2} +bx+c[/tex]

[tex]y=1x^{2}+(-4)x+1[/tex]

So, [tex]a=1,b=-4,c=1[/tex]

Then, we calculate the x-coordinate of the vertex:

[tex]x=\frac{-b}{2a}[/tex]

[tex]x=\frac{-(-4)}{2\times1}\\x=\frac{4}{2}[/tex]

[tex]x=2[/tex]

And now, we get the [tex]y[/tex] value of vertex of the function:

[tex]y=1x^{2}-4x+1[/tex]

[tex]y=1\times 2^{2}+(-4)\times (2)+1[/tex]

[tex]y=1\times 4-8+1[/tex] (when the opposite signs multiply the result is negative)

[tex]y=4-8+1[/tex]

[tex]y=-3[/tex]

Therefore, the vertex is at [tex](x,y)=(2,-3)[/tex].

Answer:

81

Step-by-step explanation:

Answer: Like terms

Example: 7x+9x are like terms because they both have an x with the same exponent of 1. We can combine them to get 7x+9x = 16x. This is like saying you have 7 boxes and you add on 9 boxes to get a total of 16 boxes.

Like terms are terms that have the identical variables and exponents. They can be combined or simplified in an expression. An example of like terms is 3x2 and 2x2 in the expression 3x2 + 2x2.

Terms that have the same variables with the same exponents on the variables are called like terms. In other words, like terms can be combined together because they have identical variable parts. For instance, in the expression 3x2 + 2x2, 3x2 and 2x2 are like terms because they both contain the variable x raised to the power of 2. Therefore, they can be simplified or added together, resulting in 5x2.

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Ron worked for 3.25 hours and the total payment is $29.25 for 11.25 hours of combined work, which equates to an hourly wage of $2.60. Therefore, Ron should receive $8.45.

To calculate Ron's share of the $29.25 payment for removing garden gnomes, we first need to determine the total amount of time worked by all three individuals. Since Steve and Jerry worked 4 hours each and Ron was 45 minutes late, Ron worked 3 hours and 15 minutes, or 3.25 hours. We can convert 45 minutes to a decimal by dividing 45 by 60, which gives us 0.75, and since Ron was late by that duration, we subtract it from 4 hours (4 - 0.75 = 3.25).

Total hours worked by all = (Steve's hours + Jerry's hours + Ron's hours) = 4 + 4 + 3.25 = 11.25 hours.

To find the hourly rate, we divide the total payment by the total hours worked: $29.25 / 11.25 hours = $2.60 per hour. Finally, we multiply Ron's hours worked by the hourly rate to find his share: 3.25 hours * $2.60 per hour = $8.45.

Answer:  5

Step-by-step explanation:

5x4=20 and you cant have half a pack of strings so it 5 packs.

Answer:

Step-by-step explanation:

2x -2+5=13

2x +3 =13

2x = 13-3

2x = 10

x = 10/2

x = 5

Answer:

1 function {(2,2),(4,4),(6,6),(8,8)} written is a function the other following coordinates are not functions due to it not being a straight line as a 'proper' function should be.

Answer:

The answer is:

{(2,2),(4,4),(6,6),(8,8)} is a function

{(0,3),(3,5),(5,6),(8,4)} is a function

{(1,2),(3,3),(4,8),(6,3)} is a function

{(3,4),(5,2),(5,6),(7,3)} is not a function

Step-by-step explanation:

Sorry I don't have an explanation, but I know these are correct because I took the test and got this correct. ;)

Answer:

It is not a function because there is a maximum.

Step-by-step explanation:

With 12 as the maximum it will not go on forever and functions do.

The amount of time a car is parked is not a function of parking cost since the cost of parking cannot exceed the maximum amount of  $12 no matter how long the car is parked in the lot.

Given:

the rate of cost of parking in a lot, R = $3 per hour

maximum cost of parking in a lot, C = $12

To explain:

The cost of parking in a lot can be calculated as;

Cost = cost rate x time

let the time = t

Cost = 3t

        Cost = 3 x 1 = $3

        Cost = 3 x 2 = $6

        Cost = 3 x 3 = $9

        Cost = 3 x 4 = $12

        Cost = 3 x 5 = $15  

(notice, $15 has exceeded $12, but the maximum cost has to be $12)

Thus, time is not a function of cost of parking since the maximum cost cannot exceed $12 no matter how long the car is parked in the lot.

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Answer:

All the zeroes of f(x) are x = 1, x = -1 + 4i and x = -1 - 4i.

Step-by-step explanation:

Given that f(x) = x³ + x² + 15x - 17

Now, we have to find all the zeroes of the function.

Given that x = - 1 + 4i is a zero of the function.

So, x = - 1 - 4i must be another zero of the function.

Therefore, (x + 1 - 4i)(x + 1 + 4i) will be factor of the function.

Hence,  (x + 1 - 4i)(x + 1 + 4i)

= x² + 2x + (1 - 4i)(1 + 4i)  

= x² + 2x + [1² - (4i)²]

= x² + 2x + 17

Assume that (x + a) is another factor of f(x).

Therefore, we can write f(x) = x³ + x² + 15x - 17 = (x + a)(x² + 2x + 17)

⇒ x³ + x² + 15x - 17 = x³ + (a + 2)x² + (2a + 17)x + 17a

Hence, comparing the coefficients we can write  

a + 2 = 1  

⇒ a = -1  

Therefore, f(x) =x³ + x² + 15x - 17 = (x - 1)(x² + 2x + 17)

So, all the zeroes of f(x) are x = 1, x = -1 + 4i and x = -1 - 4i (Answer)

Answer:

yes

Step-by-step explanation:

just solve for n

20 characters why

Answer:

Yes

Step-by-step explanation:

4n+1=n-8

4n-n+1=-8

3n+1=-8

3n=-8-1

3n=-9

n=-9/3

n=-3

-------------

3n=-9

n=-9/3

n=-3

The two equations are equivalent.

Final answer:

To solve the problem, three equations can be used: 25 ÷ 5 = ?, 5 × ? = 25, and 25 ÷ ? = 5.

Explanation:

The correct equations to help solve the problem are:

To find the number of lettuce plants in each row, you need to divide the total number of lettuce plants, which is 25, by the number of rows, which is 5. So the first equation, 25 ÷ 5 = ?, will give you the answer. The second equation, 5 × ? = 25, can also be used to find the number of lettuce plants in each row by solving for the missing value. Finally, the third equation, 25 ÷ ? = 5, can be used as an alternative way to find the number of lettuce plants in each row.

Answer:

m=-23/10

Step-by-step explanation:

-2 67/90=-247/90

m-4/9=-247/90

m=-247/90+4/9

m=-247/90+40/90

m=-207/90

m=-23/10

Good evening ,

Answer:

D : y = -6

Step-by-step explanation:

A line D has a slope of 0 shouled be parallel to the x-axis then

it’s equation in slope intercept form should be y=a

And since, It passes through the point (-1,-6) then a=-6

finally:

the equation of D is y=-6.

:)

Answer:

7 )

x =  [tex]\frac{3\sqrt{2} }{2}[/tex]

[tex]y= 3[/tex]

8 )

[tex]x=6\sqrt{6}[/tex]

[tex]y= 9\sqrt{2}[/tex]

Step-by-step explanation:

7  )                                 8)

In Δ ABC                                      In Δ XYZ            

∠ C = 45°                                          ∠ X = 60°

∠ A = 90°                                           ∠ Y = 90°

[tex]AC= \frac{3\sqrt{2} }{2}[/tex]             [tex]XY= 3\sqrt{6}[/tex]

To Find :

x = ?

y = ?

Solution:

We Know

In Δ ABC

∠ C = 45°

∠ A = 90°

∴ ∠ B = 45°  ......Angle sum property of a triangle i.e 180°

∴  Δ ABC is an Isosceles Triangle

∴ AC = AB = x =  [tex]\frac{3\sqrt{2} }{2}[/tex]

Now appplying Trignometry identity we get

[tex]\sin C = \frac{\textrm{side opposite to angle C}}{Hypotenuse}\\\\\sin 45 = \frac{AC}{BC}\\\\\frac{1}{\sqrt{2} } =\frac{\frac{3\sqrt{2} }{2}}{y}\\\\y=\frac{3\times \sqrt{2}\times \sqrt{2}  }{2}\\\\y= 3[/tex]

Now In Δ XYZ

∠ X = 60°

∠ Y = 90°

∴∠ Z = 30°  . .....Angle sum property of a triangle i.e 180°

Now appplying Trignometry identity we get

[tex]\tan X = \frac{\textrm{side opposite to angle X}}{\textrm{side adjacent to angle X}}[/tex]

[tex]\tan 60 = \frac{YZ}{XY}\\\\\sqrt{3} =\frac{y}{3\sqrt{6} }\\  y= 3\sqrt{3} \sqrt{6} \\y= 9\sqrt{2}[/tex]

Now,

[tex]\sin X = \frac{\textrm{side opposite to angle C}}{Hypotenuse}\\\\\\\sin 60 = \frac{YZ}{XZ}\\ \\\frac{\sqrt{3} }{2} =\frac{9\sqrt{2} }{x} \\\\x=\frac{18\sqrt{2} }{\sqrt{3} } \\\textrm{after fationalizing the denominator root 3 we get}\\\\x=6\sqrt{6}[/tex]

The length of ramp is 8.9 meters approximately.

Given that, the entrance of the old town library is 2.3 feet above ground level.  

A ramp from the ground level to the library entrance is scheduled to be built.  

The angle of elevation from the base of the ramp to its top is to be 15º

We have to find the length of the ramp.

Let the length of ramp be “n” feet.

Now, if we observe there forms a right angle triangle with ramp as hypotenuse and height of entrance as opposite side for angle of elevation 15 degrees.

The diagram is attached below

In the figure,

AC = length of ramp

AB = height above ground level = 2.3 feet

angle of elevation = 15 degree

Then, we know that,

[tex]\sin \theta=\frac{\text {opposite side}}{\text {hypotenuse}}[/tex]

where θ is angle of elevation.

[tex]\begin{array}{l}{\sin 15^{\circ}=\frac{2.3 \text { feet }}{n \text { feet }}} \\\\ {\rightarrow 0.2588=\frac{2.3}{n}} \\\\ {\rightarrow n=\frac{2.3}{0.2588}} \\\\ {\rightarrow n=8.8865}\end{array}[/tex]

Hence, the length of the ramp is 8.9 meters approximately.

675 people will have score between 85 and 120

Step-by-step explanation:

Given

Mean = 100

SD = 15

If we have to find percentage of score between two values we have to find the z-score for both values and then area under the curve for both values

z-score is given by:

for a value x:

[tex]z-score = \frac{x-mean}{SD}[/tex]

So,

For 85:

[tex]z-score = z_1 = \frac{85-mean}{SD}\\ = \frac{85-100}{15}\\=\frac{-15}{15}\\=-1[/tex]

[tex]z-score = z_2 = \frac{120-mean}{SD}\\ = \frac{120-100}{15}\\=\frac{20}{15}\\=1.3333[/tex]

Now we have to find the area under the curve for both values of z-score. z-score tables are used for this purpose.

So,

For z1 : 0.1587

For z2: 0.9082

The area between z11 and z2:

[tex]z_2-z_1 = 0.9082-0.1587=0.7495[/tex]

So the probability of score between 85 and 120 is 0.7495

As the sample is of 900 people, the people with scores between 85 and 120 will be:

900*0.7495 = 674.55 people

Rounding off to nearest whole number

675 people will have score between 85 and 120

Keywords: Probability, SD

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The acceleration rounded off to the nearest 100th is: -2.14 m/s^2

Step-by-step explanation:

Acceleration can be defined as the change in velocity over time.

The acceleration is negative in case of slowing down as the velocity goes from a higher value to lower value.

The formula for acceleration is:

[tex]a=\frac{Change\ in\ velocity}{time}\\a=\frac{v_f-v_i}{t}\\Here,\\v_f\ is\ final\ velocity\\v_1\ is\ initial\ velocity\\t\ is\ time[/tex]

Given

v_f = 230 m\s

v_i = 245 m\s

t = 7

Putting the values

[tex]a=\frac{230-245}{7}\\=\frac{-15}{7}\\=-2.14\ ms^{-2}[/tex]

Hence,

The acceleration rounded off to the nearest 100th is: -2.14 m/s^2

Keywords: Velocity, Acceleration

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Answer:

20% peanuts are there in the mixture of nuts.

Step-by-step explanation:

Total weight of the mixture =25 lbs(10+15)

In the 25 lbs mixture of nuts, 68 % is peanuts, therefore finding the total weight of peanuts.

68 % of 25 lbs= 17 lbs.

There is a total 17 lbs of peanuts in the mixture .

15 lbs of peanuts was exclusively added, therefore the rest 2 lbs must have come from the mixture of nuts.

Therefore, there is a total of 2 lbs of peanuts in 10 lbs of mixture of nuts.

[tex]\frac{2}{10} *100[/tex] =20 %

20% peanuts are there in the mixture of nuts.

Wahab has to donate at least 50 books to reach his goal

Given that, Wahab wants to donate at least $6000 in books and pairs of shoes.  

Let "B' represent the number of books

Let "S" represent the number of pairs of shoes that Wahab must donate to achieve his goal.  

20B+50S ≥ 6000 ⇒ this is the inequality for total donation.  

Wahab donates 100 pairs of shoes.  

Now, as he donated 100 pairs of shoes, S = 100, so substitute this in inequality.

20B + 50(100) ≥ 6000

20B + 5000 ≥ 6000

20B ≥ 6000 – 5000

20B ≥ 1000

B ≥ 50

Hence, wahab has to donate at least 50 books to reach his goal.

The question is incomplete. Here is the complete question:

A 20-foot ladder is leaning against a wall. The foot of the ladder makes an angle of 58 degrees with the ground. Find, to the nearest foot, the vertical distance from the top of the ladder to the ground.

Answer:

17 ft

Step-by-step explanation:

Let the height from the top of the ladder to the ground be 'x' feet.

Given:

The triangle for the given situation is shown below.

Now, from the triangle ABC, AB is the length of the ladder, A is the top of ladder, B is the foot of the ladder and AC is 'x'.

The length of the ladder is, [tex]AB=20\ ft[/tex]

The angle made by the foot of the ladder with the ground is, [tex]\angle ABC=58[/tex]°

Now, using the sine ratio for the angle ∠ABC, we have:

[tex]\sin(\angle ABC)=\frac{AC}{AB}\\\sin(58)=\frac{x}{20}\\x=20\times \sin(58)\\x=20\times 0.8480\\x=16.96\approx 17\textrm{ ft (Nearest foot})[/tex]

Therefore, the vertical distance from the top of the ladder to the ground is 17 feet.

Creating parallel and perpendicular lines involves understanding that parallel lines share the same slope, while perpendicular lines have slopes that are negative reciprocals of each other. A line that is neither parallel nor perpendicular to a given line simply has a slope that does not meet these conditions.

Given the lines in your question, you're asked to create a parallel, perpendicular, and neither parallel nor perpendicular line. Let's consider the first line: y = 3x.

1) A line parallel to y = 3x will have the same slope, so the equation of such a line can be y = 3x + b. You can choose any value for b, as it shifts the line up or down but doesn't change its slope.

2) A line perpendicular to y = 3x would have a slope that is the negative reciprocal of 3, which is -1/3. So, such a line can be represented by the equation y = -1/3x + b. Again, any value of b will work.

3) A line that is neither parallel nor perpendicular to y = 3x could have any slope that's not equal to 3 or -1/3. For instance, the line y = 2x + b is neither parallel nor perpendicular to y = 3x.

Do the same for all the remaining lines by understanding these principles.

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Answer:

19 ft, 24 ft and 38 ft are the lengths of triangle.

Step-by-step explanation:

Let the length of second side be x.

Now given:

Given: Length of first side is 2 times length of second side = 2x

Given:Length of third side is 5 ft longer than the second side = 5+x

Perimeter of triangle = 81 ft.

Need to Calculate length of each side.

Now we know that sum of all three sides of triangle is equal to perimeter of triangle.

Hence,

[tex]x+2x+5+x =81\\4x= 81-5\\4x=76\\x=19 ft[/tex]

Also,

2x= 2×19 =38 ft.

5+x = 5+19 =24 ft.

Hence,

Length of first side  = 38 ft.

Length of second side = 19 ft.

Length of third side =24 ft.

Answer:

C

Step-by-step explanation:

Step-by-step explanation:

Your equation is:

[tex] \frac{x}{8} + 3 = 7[/tex]

[tex] \frac{x}{8} = 4[/tex]

[tex]x = 32[/tex]

The student's question involves solving the algebraic equation x/8 + 3 = 7 to find the value of the unknown variable x. The solution to the equation is x = 32.

The question asks us to solve an equation involving the unknown variable, which is a common type of problem in algebra. According to the question, 'Three more than the quotient of a number and 8 is equal to 7'. This can be translated into the equation x/8 + 3 = 7, where x is the number we are trying to find.

To solve for x, we need to isolate it on one side of the equation. We start by subtracting 3 from both sides of the equation:

Next, we multiply both sides of the equation by 8 to solve for x:

Therefore, the unknown number is 32.

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Paul caught 3 pike and 1 salmon

The total number of fish the three boys caught is 16

Solution:

According to question,

Mike caught 1 pike and 4 salmon

Charlie caught 5 pike and 2 salmon

Paul caught half the number of pike that both Charlie and Mike caught combined, and 1 less salmon than Charlie caught

Pike caught by Paul = half of number of pike that both charlie and mike caught combined = [tex]\frac{1}{2} (5 + 1) = 3[/tex]

Salmon caught by Paul = 1 less salmon than Charlie caught = 2 - 1 = 1

Thus, Paul caught 3 pike and 1 salmon

Total of numbers Pike caught by three boys are  

5 + 1 + 3 = 9 pikes

Total of numbers salmon caught by three boys are  

4 + 2 + 1 = 7 salmons

Hence , the total number of fish caught are

9 + 7 = 16 fishes