Answer:
f(7) = -62
Explanation:
Basically, what the question is asking us to do is to plug in 7 every time we see an x.
f(x) = 2(18 - 9x) + 4x
f(7) = 2(18 - 9(7)) + 4(7)
f(7) = 2(18-63) + 28
f(7) = 2(-45) + 28
f(7) = -90 + 28
-62
f(x)=2(18-9x)+4x
f(7)=2(18-9(7))+4(7)
f(7)=2(18-63)+28
f(7)=2(-45)+28
f(7)=-90+28
f(7)=-62
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