15 computers for 45 students, 45 computers for 135 students

The measure of angle O is 7pi/4. The measure of its reference angle is _degree, and tan O is _?

There are 4 aces and 4 kings in a standard deck of 52 cards. You pick onecard at random. What is the probability of selecting an ace or a king. Explain your reasoning.

If x+y=4 and x-y = a, then what does x equal?

a beaker holds 50mL of a liquid. How many centiliters does the beaker hold? a. 5000cL b. 5cL c. 5000cL d. 500cL

The circumference of a circle with a radius of 5, using 3.14 for pi, to the nearest tenth

What is a dozen in mathmatics?

How many days has it been since august 24th 2017

There is a sales tax of $6 on an item that costs $88 before tax. The sales tax on a second item is $21. How much does the second item cost before tax?

A shirt originally priced at24.50. Theshirt goes on sale for 30% off the original price. How much money in dollars doestje shirt cost including 7%

Tara and jodys bedrooms are shaped like rectangles. Tara bedroom is 9 feet long and 8 feet wide. jodys bedroom is 7 feet long and 10 feet wide. whose bedroom has the greater area?