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3 years ago

PLSSSSS HELP ME!!! 80 Points!!

Mathematics

2 answers:

PIT_PIT [208]3 years ago

8 0

Answer: (-1; 3)

Step-by-step explanation:

y = -x + 2

y = 4x + 7

4x + 7 = -x + 2

4x + 7 + x - 7 = - x + 2 + x - 7

5x = - 5

x = - 1

y = 4(-1) + 7

y = 3

Intersection point: (-1; 3)

See the solution on the photo

maks197457 [2]3 years ago

7 0

Answer:

y=−x+2y=4x+7 NO

y=−x+2 YES

y=4x+7

Multiply the first equation by 4, obtaining: 4y = -4x + 8

Add the 2nd equation to this result: y = 4x + 7

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

5y = 15, and y = 3

Then, using the first equation, determine x:

y = 3 = -x + 2

1 = -x, so x = -1

The solution is (-1, 3)

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