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Mandarinka [93]
3 years ago
15

Idk how to do this and I need it in an hour

Mathematics
1 answer:
olchik [2.2K]3 years ago
4 0

Answer:

a) 2x^2+8-5x+-3x^2-4+7x\\\\= -1x^2+2x+4

b) 2x^2+8-5x--3x^2-4+7x\\\\= 5x^2+2x+4

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What is the solution for the system of equations? y=−x+4 y= x−2
MissTica

Answer:

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Step-by-step explanation:

Given the 2 equations

y = - x + 4 → (1)

y = x - 2 → (2)

Substitute y = x - 2 into (1)

x - 2 = - x + 4 ( add x to both sides )

2x - 2 = 4 ( add 2 to both sides )

2x = 6 ( divide both sides by 2 )

x = 3

Substitute x = 3 into either of the 2 equations and solve for y

Substituting into (2)

y = 3 - 2 = 1

solution is (3, 1 )

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