Jennifer W. answered 11/09/15
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General Tutor - Certified in Multiple Subjects
f(c) = -3c+5
f(c+7)=-3(c+7)+5
f(c+7)=-3c-21+5
f(c+7)=-3c-16
f(c+7)=-3(c+7)+5
f(c+7)=-3c-21+5
f(c+7)=-3c-16