Ruben bougt 6 new books for his collection. This increased his collection by 12%. How many books did he have before his purchases.

What is the maximum number of 3.5-to-5-min songs that can fill a 120-min cd? what is the minimum number? on a separate sheet of paper, write your answer as a compound inequality. explain your reasoning.

Match the pairs of equations that represent concentric circles. Tiles 3x2 + 3y2 + 12x - 6y - 21 = 0 5x2 + 5y2 - 10x + 40y - 75 = 0 5x2 + 5y2 - 30x + 20y - 10 = 0 4x2 + 4y2 + 16x - 8y - 308 = 0 x2 + y2 - 12x - 8y - 100 = 0 2x2 + 2y2 - 8x + 12y - 40 =

the length of a rectangle is 3 yd longer than its width. if the perimeter of the rectangle is 34 yd, what is it's area.

3x^2 - x - 2 = 0. my homework wants me to solve this quadratic equation and show all the work

A jet flies at an altitude of 52,800 feet. What is the jets height in miles?

A row of plaques covers 120 square feet of space along a wall. If the plaques are 3 feet tall, what length of the wall do they cover?

Solve the inequality 4 (x+1) < 2x+3 Show steps

How many solutions does the equation 5x + 10 = 5x - 8 have?

Stan is on a bike ride. His GPS indicates that he has traveled exactly 18 miles and he is 32% complete with his total ride. How many miles long is Stan's ride?

What is the inverse of f (x) = The quantity of three x plus five, over seven.?