Question

Consider the functions f(x) = 2(x − 9) and g(x) = 4x. What is the value of (f − g)(5)?

12

28

20

−28

Answer 1

Just remember: (f-g)(5)=f(5)-g(5)

Answer 2

So what do i plug in?

Answer 3

Plug in 5 in both of the functions and subtract the outcomes.

Answer 4

so, f(5) = 2(5-9) and g(5)=4 times 5?

Answer 5

now i am confused

Answer 6

simplify
f(5) = ???
g(5) = ???

Answer 7

you got it right earlier... just need to simplify....

Answer 8

ohhh...

Answer 9

@Andrewisbadatmath: right, and if you've found f(5) and g(5), you calculate their difference: f(5) - g(5)

Answer 10

ok thank you

Answer 11

YW!

Answer 12

so it is -12?

Answer 13

no i meant 12

Answer 14

f(5) = 2(5-9) = 2*(-4)=...
g(5) = 4*5 = ...

f(5) - g(5) = ... (not 12)

Answer 15

You will get -8 - 20 = ...