Maria bought seven boxes. a week later all her boxes were destroyed in a fire. there are now only 22 boxes left. with how many did she start with

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?

How do you find the area of a triangle

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?