Question

Let f(x)=12/4x+2 find f(-1)
A. -6
B. -2
C. 2
D. 6

Answer 1

f(-1) = 12/(4*(-1) + 2) => 12/(-2) = -6 @Morgan27

Answer 2

plug in (-1) into 4(x)+2 then divide that by 12

Answer 3

and if you have more problems like that just do the same

Answer 4

Thank you. I got -6 at first but the way I did it just didn't seem right lol

Answer 5

AS WRITTEN f(-1) = 12/4(-1)+2 = 3(-1)+2 = -3+2 = -1

If you intended f(x) = 12/(4x+2), we have f(-1) = 12/(4(-1)+2) = 12/(-4+2) = 12/(-2) = -6

The parentheses are NOT optional if you want to write what you mean.

Answer 6

Thank you for explaining it. :)

Answer 7

Could you help me with one more? Pleaseee :)

Answer 8

Post new problems on new threads, please. SHOW your work. Don't make us guess.