Mary Ann F. answered 12/29/14
Tutor
5.0
(1,040)
Math & Science... Algebra and Geometry specialist
Hi Alex -
Think About what "the opposite" of a number means.
What is the opposite of 10? Well, that would be -10
What is the opposite of - 20? That would be 20
It's the same number, just on the other side of zero. (Think about a number line. These two numbers are in the opposite directions from zero.)
So what is the opposite of Stacy's thermostat setting of 74? That would be -74.
We need to choose a range that surrounds this number. The left hand number needs to be MORE negative and the right hand number needs to be LESS negative.
Can you answer this question now?