There are 90 students in a speech contest. yesterday, 2/5

of them gave their speeches. today 1/3 of the remaining students gave their speeches. how many students still haven't given their speeches?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

What is the factored form of the following expressions? d^2 – 13d + 36

Julian wrote the following numeric pattern on the board3,10,17,24,31,38.what numbers of julian's pattern are compound numbers.