PLS HELP!!! there are 72 students in a speech contest. yesterday, 1/3 of them gave their speeches. today, 5/6 of the remaining students gave their speeches. How many students still haven't given their speeches?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Find the distance between (7,-6) and (-3,-9)

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30