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OpenStudy (anonymous):
Solve, using the substitution method. 2x + 4y = 16 x – 7 = – 4y A.(0,-7) B.(0, 7/4) C.(9, -1/2) D.(17, -5/2)
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OpenStudy (danjs):
x = -4y + 7 put into first equation
OpenStudy (danjs):
2(-4y+7) +4y = 16
OpenStudy (danjs):
-8y + 14 + 4y = 16 -4y = 2 y = -1/2
OpenStudy (anonymous):
x=9?
OpenStudy (danjs):
Put that y value into one of the equations in the question.
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OpenStudy (danjs):
x - 7 = -4(-1/2) = 2 x=9 yep
OpenStudy (anonymous):
the answer is C
OpenStudy (danjs):
ok, that was figured out 2hrs ago above.
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