There are 200 9th graders in the freshman class. 2/5 of the students are girls. How many girls are in the freshman class?

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?

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11