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Vanyuwa [196]
3 years ago
5

Can someone help me find the Complete the missing value in the solution to the equation.

Mathematics
1 answer:
ExtremeBDS [4]3 years ago
7 0
You are shown an ordered pair with an x-coordinate of -5, so replace x with -5 and solve for y.

-3x + 7y = 5x + 2y

-3(-5) + 7y = 5(-5) + 2y

15 + 7y = -25 + 2y

5y = -40

y = -8
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Determine whether y varies with x. If so, find the constant of variation and write the function rule.
ira [324]

Answer:  Yes, y does vary directly with x.

Constant of variation = 1/4

The function rule is  y = (1/4)x

=========================================================

Explanation:

Let's assume that y does vary directly with x.

If that's the case, then we have an equation in the form y = kx, where k is the constant of variation.

Solving for k gets us k = y/x

For each row, divide the y value over the x value

  • row one: k = y/x = 14/56 = 0.25
  • row two:  k = y/x = 20/80 = 0.25
  • row three: k = y/x = 22/88 = 0.25

Each row yields the value k = 0.25 and it fully confirms y does vary directly with x.

So y = kx becomes y = 0.25x as the function rule, which is equivalent to y = (1/4)x

6 0
1 year ago
Lisa is on a run of 12 miles. She has 4 hours to complete her run. How many miles does she need to run each hour to complete the
Andrew [12]

Answer:

3 miles/h

Step-by-step explanation:

<u>You can set up a division problem to represent the equation.</u>

12 miles÷4 hours=3 miles/hr

4 0
2 years ago
Trina said $1.05+$2.25 =$3.75 because a dollar and 2 quarters plus 2 dollars and a quarter equals 3 dollars and 3 quarters. Do y
tatuchka [14]

Answer:it is approximately 4 dollars and 6 cents

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A newspaper reporter says that a company made 700,000 profit last year it says this was 12% more then the year before . Work out
Dmitriy789 [7]

Answer:

625000

Step-by-step explanation:

x+12%= 700000

x*1.12=700000

x=700000/1.12

x=625000

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3 years ago
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Answer:

50%

Step by step explanation

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Since it is both blue and black, it is doubled from 25 to 50

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3 years ago
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