Mathematics
shawnecew
10

y = –3x + 6 y = 9 What is the solution to the system of equations? (–21, 9) (9, –21) (–1, 9) (9, –1)

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(2) Answers
Sframe

It is given that y=9, this narrows down our answer choices.  (x,9)  B and D can't be the answers due to the fact the y-coordinate isn't 9.  Let's try A.  Plug in 9 for y then solve for x:  9 = –3x + 6 Subtract 6 on both sides to get:  3=-3x x=-1  A is not the answer.  That leaves us with C and C is the answer because x=-1 and y=9  Final answer: C (-1,9) 

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The answer is c (-1,9

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