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kkurt [141]
3 years ago
15

PLEASE HELP ME I WILL MARK U AS THE BRAINIEST ANSWER!

Mathematics
1 answer:
bagirrra123 [75]3 years ago
7 0

Answer:

(21, 8)

(3, 2)

(-15, -4)

Step-by-step explanation:

First we need to create the equation in y=mx +b form.

(m) is slope [rise/run]

(b) is y intercept

The line crosses the y axis at (0,1) so that's our (b) and to find slope we will find a point where ethe line crosses a point, I'll use (0, 1) and see how many it has to go to reach the next point. In this case it has to go up 1, and right 3.

Our slope is 1/3.

y=1/3x+1.

Now we can start applying the given points.

(21, 8)

8=1/3(21)+1

8=7+1

8=8.

(21, 8) is a solution.

(3, 2)

2=1/3(3)+1

2=1+1

2=2

(3, 2) is a solution.

(-15, -4)

-4=1/3(-15)+1

-4=-5+1

-4=-4

(-15, -4) is a solution.

(12, 9)

9=1/3(12)+1

9=4+1

9=5

(12, 9) is not a solution.

(-6, 1)

1=1/3(-6)+1

1=-2+1

1=-1

(-6, 1) is not a solution.

Hope this helps! If you have any questions on how I got my answer feel free to ask. Stay safe!

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Answer:

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Answer:

Plane Speed (x) = 378 mph

Step-by-step explanation:

Equation

d = r * t

Givens

With the wind

  • d = 1680 miles
  • t = 4 hours
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Against the wind

  • d = 1680
  • t = 5 hours
  • r = x - y

Equation

The distances are the same, so you can solve for x in terms of y and then deal with the actual distance.

(x + y)*4 = (x - y)*5                   Remove the brackets on both sides

Solution

  • 4x + 4y = 5x - 5y                     Subtract 4x from both sides
  • 4y = -4x + 5x - 5y                    Combine
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  • 5y + 4y = x
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Solution part 2

Now take one of the distance formulas and solve for x first then y.

  • (x - y)*5 = 1680               Substitute 9y for x
  • (9y - y)*5 = 1680             Subtract on the left
  • 8y * 5 = 1680                  Multiply on the left
  • 40y = 1680                     Divide by 40
  • y = 1680/40            
  • y = 42                             That's the speed of the wind.
  • (x - y)*5 = 1680               Substitute the wind speed for y
  • (x - 42)*5 = 1680             Divide both sides by 5
  • (x - 42) = 1680 / 5            Do the division on the right
  • (x - 42) = 336                   Add 42 to both sides.
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4 years ago
The graph of f(x) = X is reflected over the y-axis. Use the graphing calculator to graph this reflection. Which list contains
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Answer:

Option A.

Step-by-step explanation:

Note : The given function is linear, all options are incorrect for linear function.

Consider the given function is

f(x)=\sqrt{x}

For x=81,

f(81)=\sqrt{81}=9

For x=36,

f(36)=\sqrt{36}=6

For x=1,

f(1)=\sqrt{1}=1

It means the given function passes through the points (81,9), (36,6) and (1,1).

If a graph reflected across y-axis then

(x,y)\rightarrow (-x,y)

So, the new function is

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It means points (-81, 9), (-36, 6) and (-1, 1) lie on the graph of the reflection.

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