The cruise control of Megan's truck is set at 65 miles per hour, but her actual speed may vary by as much as 5 miles per hour. Write an inequality that can be used to determine the actual speeds at which Megan could be traveling.

Question

johnweldon1993 · Answer

Well you know that since it is varying at 5mph...it can go above...or below 65 mph by 5 mph...

So that means

$$60 \le 65 \le 70$$

She will always be in that interval...either below 70 or above 60