Answer:
-19
Step-by-step explanation:
f(x) is the same as solving for the variable y
So y= -4(7)+9
f(7)= -28+9 = -19
Answer:
75
Step-by-step explanation:
f(x)=-x^2-10x
f(-5)=(-5)^2-10(-5)
f(-5)=(-5)(-5)+50
f(-5)=25+50
f(-5)=75
I think the answer is sometimes or never.
