In mrs marshall's classroom 6/7 of the students play sports. of the students who play sports, 4/5 also play an instrument. if there are 35 students in her class how many play sports and an instrument?

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n