Question

Can someone check my work on this problem?

Answer 1

\[f(x)=-3x+2 \] f(x) = 7 \[g(x)=3x ^{3} +5\] g(x) = -4

Answer 2

i got f(x) = -19 and g(x) = -187

Answer 3

I think you meant f(x)=-3x+2 is to be evaluated at x=7.

f(x)=-3x+2 defines the function; x=7 defines the x value at which you are to evaluate the function. f(7)=-3(7)+2 is indeed -21+2, or -19. Good job.

Answer 4

Likewise,
\[g(x)=3x ^{3} +5\] is to be evaluated at x=-4. Write g(-4) = 3(-4)^3+5.

What is 3(-64)+5?