Question

Evaluate -13 + |3.1 - 4.2|.

Answer 1

-13 + |3.1 - 4.2|
= -13 + | -1.1|
= -13 + 1.1
= -11.9

Answer 2

Absolute value cannot be negative and it is greater than or equal to zero and since 3.1<4.2
So you must multiply by -1 to remove absolute value sign.
=-13+(-1(3.1-4.2))
And then @RolyPoly's answer :)