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marissa [1.9K]
2 years ago
8

Y=-1,X+2y=9 solve by substitution show all work

Mathematics
1 answer:
Inga [223]2 years ago
4 0

Answer:

x = 11

Step-by-step explanation:

Substitute y = -1 into the equation.

x+2y = 9

; x+2(-1) = 9

x+(-2) = 9

x-2 = 9

x = 9+2

x = 11

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<h2>The Pythagorean Theorem</h2>

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<h2>Solving the Question</h2>

We're given:

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Plug these measurements into the Pythagorean theorem:

a^2+b^2=c^2\\9^2+12^2=c^2

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c^2=225

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