WILL GIVE BRAINLIEST, THANKS, STARS, AND EXTRA POINTS!! Please write TWO written expressions for each.

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0