It takes mandy 7 hours to clean the pool. it takes cynthia 9 hours. how long would it take them working together?

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

Given the diagram below, michael writes, "segment ac is congruent to segment ac." which of the following reasons allow him to write this statement?