in a bookstore, a customer gets 2 pencils free for every $6 spent. Dewei received 8 pencils free. How much did he spend in the bookstore?

What properties allow transformation to be used as a problem solving tool

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then, the two had the same amount of money. how much money did each have originally?

How are sas and sss used to show that two triangles are congruent?