Answer:
d
Step-by-step explanation:
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i think the area is 60 i added it up
-1(-5-c)
-1*-5=5
-1*-c=c
:5+c
x=-1
f (x)= -x + 8
Let f(x) = 9
9 = -x+8
Subtract 8 from each side
9-8 = -x+8-8
1 = -x
Multiply each side by -1
-1 = x