Divide the sum of -13/8 and 5/12 by their difference

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents