Question

If f(x) = 9 – 4|x + 1|, find f(–5).
I just need someone to make sure I did this right. I'll post my work shortly.

Answer 1

Okay, I know I did something wrong here..

Answer 2

the order of operation is incorrect.

Answer 3

you can;t 9-4 when you have to multiple the 4 to the ||

Answer 4

multiplication has higher priority than subtraction

Answer 5

Was I supposed to do -5+1 first or something?

Answer 6

9-4(-4)
till here, its correct

Answer 7

Do the || first then multiple it by 4 then subtract

Answer 8

***
9-4|-4|

which is
9-4(4)

Answer 9

so do 4(4) = 16 first

Answer 10

=9-16=....

Answer 11

Oh.. multiply the fours and then subtract. Oops.

Answer 12

yes.

Answer 13

By the way, mipie13, it helps me tremendously when you share your work with me and others who are in a position to help you.

Answer 14

remember that |-a| = a when a is positive.

so, what can you say about |-4| =... ?

Answer 15

4

Answer 16

So, did I do that right?