A woman gave birth to twins. The baby girl was 6 lb. 5 oz. And the boy was 5 lb. 12 oz. How much did they weigh together?

Abouncy ball is dropped such that the height of its first bounce is 5.5 feet and each successive bounce is 64% of the previous bounce's height. what would be the height of the 7th bounce of the ball? round to the nearest tenth (if necessary).

How to solve a simultaneous equation involved with fractions?

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?