Answer:
-28.
Step-by-step explanation:
f(x) = -2|x| + 8,
When x = -18, |x| = 18 (absolute value).
f(-18) = -2*18 + 8
= -36 + 8
= -28.
f(-18) means that you must plug -18 in for x and solve like so:
f(x) = -2|-18| + 8
The two bars (| |) on the either side of -18 means "absolute value." This means that you must the number inside the bars positive so...
-2 * 18 + 8
Now to solve this you use the PEMDAS method:
-2 * 18 + 8
-36 + 8
F(-18) = -28
Hope this helped!
~Just a girl in love with Shawn Mendes
