Only number 7 please hurry

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2

What are two numbers that have a sum of 15

Marion has a bicycle that she is planning to take for a ride. the rim of the rear wheel lies 41 cm from the center of the wheel. the tire itself has a thickness of 3 cm. in order for marion to ride her bicycle 96,712 cm approximately how many rotations will the rear wheel make?