The school library received an order 232 new books what is 232 rounded to nearest ten

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.