Mary used addition of two rational numbers to solve a problem john used subtraction to solve the same problem. is it possiblr they both solved the problom correctly?

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.