What is 9+10 hurry or i will l fail

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?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )