Answer:
14
Step-by-step explanation:
f(x)=2x+7
f(4)=2(4)+7
=8+7
=15
f(-4)=2(-4)+7
=-8+7
=-1
f(4)+f(-4)
=15+(-1)
=14.
Answer:
25
Step-by-step explanation:
f (x)= 2x^2-7
Let x=4
f (4) = 2 ( 4)^2 -7
Exponents first
f(4) =2*16 -7
Multiply
f(4) =32 -7
Subtract
f(4) =25
