All you have to do is plug in 15 to f(x) to get
15=4|x-5|+3 then solve for x
12=4|x-5|
3=|x-5|
3=x-5
-3=x-5
x=8, -2
Hope this helped :)
Answer:
Man i'm sorry. I'm part of the community myself and I don't understand why some people get mad at others for being straight.
<span>Given the proportion a/b = c/d, the extremes are a and d.
The means are b and c.
To remember this, think about the terms of the proportion as being in order:
a, b, c, d. On the ends are a and d and are the extremes. Between the extremes are the means, b and c.</span>