Shawna won 51 pieces of gum playing basketball at her school's game night. later, she gave three to each of her friends. she only has 6 remaining. how many friends does she have?

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

Explain how you can use the associative property to evaluate (7x50)x4.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?