at a school there are 63 sixth grade students who buy their lunch. there are 90 students in the sixth grade. what percent of the sixth grade students in the school buy their lunch?

Solve the equation by using the Properties of Equality 7/3y + 2 = 1/2

A high school purchases a printing machine that can put lettering on clothing for $6000. The school plans to print T-shirts with the school logo and sell them. Each T-shirt costs the school $4 and will sell for $12.

Huilan's age is two times thomas's age. the sum of their ages is 84. what is thomas's age?

manager needs to buy chairs for his office the price for 1 chair is 79.99 dollars. If the manager buys 2 or more chairs then he get's a 40% discount on each chair. Approximately how much will the manager save on each chair if he buys 2?

What what kind of triangles are the coolest

Name a fraction equivalent to 2/3

The teacher has 15 gold prize ribbons, 22 blue ribbons, and 5e red ribbons. There are 12 boys and 18 girls in the class.

3 (6x^2-5x+7) - 2 (-4x^2+8-10)

A model ship is built to a scale of 1 centimeter: 5 meters

Simply: x^3 y^3 / x^3 y^2 (the arrows mean to the power of the number)