Solve this system of equations. Hint: Use graphing, substitution, or elimination to find the points (x,y) that make both equations true.
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Question

Solve this system of equations.  Hint: Use graphing, substitution, or elimination to find the points (x,y) that make both equations true.
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anonymous · Answer

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nali · Answer

since y = x^2 - 5 then plug it in for the other equation

-3x+ y = -7
-3x+ (x^2 - 5) = -7

then it becomes 

x^2 -3x - 5 =-7

x^2-3x +2= 0

(x - 1) (x- 2) =0

x-1 = 0     or      x-2=0
x=1                      x=2

nali · Answer

to solve for y plug in x= 1 and then x=2

into y= x^2 -5