2. find the least common multiple of 3 and 21.

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

Which of the following is the rational exponent expression of 6 root f

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?