Jane and jill collect yo-yo’s. the ratio of the number of jane’s yo-yo’s to the number of jill’s yo-yo’s is 5: 4. if jane will give 15 of her yo-yo’s to her little brother, jane and jill will have the same number of yo-yo’s in their collections. how many yo-yo’s do both girls have together?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?

What is not true about kl and mn? what is mn? (show )