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3 years ago

24 PTS!!!!!!1

Mathematics

1 answer:

balandron [24]3 years ago

8 0

Answer:

D (7, 0.5)

Step-by-step explanation:

The equations must be interpreted to be ...

y = -1/2x +4
y = 1/2x -3

A graph shows the solution to be (7, 0.5), matching selection D.

___

You can add the two equations together to get ...

(y) +(y) = (-1/2x +4) + (1/2x -3)

2y = 1 . . . . . simplify

y = 1/2 . . . . .divide by 2

It can be convenient to use the second equation to find x.

1/2 = 1/2x - 3

1 = x - 6 . . . . . . multiply by 2

7 = x . . . . . . . . . add 6

The solution is (x, y) = (7, 0.5). . . . . matches selection D.

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Solve x-5y=-30, 3x+5y=10 show your work

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1) x = 5y - 30

2) x = - 1.6y + 3.3

<em>im assuming these are 2 different questions</em>

<h3>Explanation:</h3><h3>1)</h3>

Start with the equation:

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add 5y to both sides:

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Your answer is x = 5y - 30

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subtract 5y from both sides:

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