If a @ b = 2(a + |b|), what is the value of 2 @ (-2 @ -1)?
A. -8
B. 4
C. 0
D. -4
E. 8
We first need to solve what is inside the parentheses.
What is (-2 @ -1)? Well, just plug in the values and you get the following:
If a @ b = 2(a + |b|), then
-2 @ -1 = 2(-2 + |-1|)
= 2(-2 + 1)
= 2(-1)
=-2
Now we need to figure out the value of 2 @ -2:
2(2 + |-2|) =
2(4)=
8.
The answer is (E).
source: proprofs.com
