Jerry drew a figure on the board claiming that it was a right triangle. What side lengths of the figure would show that Jerry is correct?

Can someone pls ! pls answer all. no explanation needed..

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

What function has a range {yly< 5}? question on picture above^