Abag contains 2 steel balls and 5 brass balls. the total weight is 13 pounds. if 2 steel balls are added and 2 brass balls are removed, the weight decreases to 12 pounds. how much does each kind of ball weigh?

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?

Katie wants to collect over 100 seashells. she already has 34 seashells in her collection. each day, she finds 12 more seashells on the beach. katie can use fractions of days to find seashells. write an inequality to determine the number of days, dd, it will take katie to collect over 100 seashells.