Need answer asap

2r+3s-t=3
solve for r, s,and t

Hannah works at the mall selling book bags. she sold 35 book bags in 5 hours. how many book bags did she sell per hour?

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]