Question

Please HELP WILL GIVE MEDAL!

[3.06] Given the function f(x) = −2x + 8, find x if f(x) = 22.

−36

−7

52

−15


(please explain)

Answer 1

It's a function. Just plug 22 in everywhere you see x in the function. 22 is called the argument.

Answer 2

Be careful as they get more complicated...if the argument is negative, I like to put parentheses around it before I plug it in...this makes me think about order of operations.

Answer 3

not quite,

I think f(x) = 22 so replace f(x) with 22 and then solve for x

Answer 4

oh ok wait who is correct

Answer 5

f(x) = 2(x+6) = 22
2(x+6) = 22
2x + 12 = 22
2x = 10
x = 5

Answer 6

well some people like to think f(x) as y
so y = -2x + 8 and y = 22

Answer 7

Oh whoops! Sorry...xpupster is right. I was reading too fast, just answered a similar problem

Answer 8

there is no 5 in your multiple choice try to solve the way I showed you

Answer 9

ok

Answer 10

wait there os no 5 @kathy0514

Answer 11

Follow Kathy's model but use the function in your problem. Notice that she used a different function

Answer 12

−7

Answer 13

Sounds good :)

Answer 14

good job cait

Answer 15

great job!

Answer 16

yay thxx guys

Answer 17

bye