SOLUTION: Please help me solve f(5) + h (5) if f(x)=7x

SOLUTION: Please help me solve f(5) + h (5) if f(x)=7x - 40 h(x)= -x^2 + 6x

Question 72595: Please help me solve
f(5) + h (5)
if
f(x)=7x - 40
h(x)= -x^2 + 6x
Answer by bucky(2189) (Show Source): You can put this solution on YOUR website!
Given:
.

.
and
.

.
f(5) means to go to the equation for f(x) and replace all the x's with 5. When you do, then
you get:
.

.
Similarly, h(5) means to go to the equation for h(x) and replace all the x's by 5. And when you,
make this substitution you get:
.

.
so adding f(5) to h(5) is equal to and the result is zero.
.
So the answer to your problem is zero.
.
Hope this helps you to understand how to deal with f(x), g(x), and h(x) when numbers are
given such as f(5), g(-2), and h(0). Just plug those numbers in for x in the equations
for f(x), g(x), and h(x).

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