Jacob jogs 3/4 miles he than jogs 1/3 mile how many miles does he jog

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Can someone me with the property questions for 12 13 and 14 plz

Having a hard time understanding this question (see attachment).