Henry needs 2 pints of red paint and 3 pints of yellow paint to get a specific shade of orange. If he uses 9 pints
of yellow paint and wants the same orange color, how
many pints of paint will he need altogether? Explain how
you know

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

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 show me step by step how to do this?