Question

Given f(x) = -x + 15, what is f(-3) ?

A.
–45

B.
12

C.
18

D.
45

Answer 1

plug in -3 for x.

Like if I was to solve for f(-5) this is what I would do.
\[f(x) = -x + 15\]\[f(-5) = -(-5) + 15\]\[f(-5) =+5 + 15\]\[f(-5) =20\]

Answer 2

okay. I'll try it

Answer 3

Yes, and tell me what you get for f(-3) after you solve it.

Answer 4

ok

Answer 5

I got 18. Is that right?

Answer 6

@SolomonZelman

Answer 7

yes , way to do it !!

Answer 8

Can I test you with similar question ?

Answer 9

Um okay

Answer 10

Given f(x) =x^2+4 . Find f(-1) ?

Answer 11

I'm not sure but maybe -1?