Answer:
f(2)= -4 f(3)= 1
Step-by-step explanation:
Im not in this math section yet but i think that you can look it up as a worksheet and find the answer on google.
Answer:

Step-by-step explanation:

I believe the answer is B because you multiply 18 and 40 then subtract 320 from that and you will 400.
y=2x so replacr the -y with -2x so 2x+6 is 8x. :)