The number of pens used varies directly with the number of pieces of paper needed. If 12 pens are used when 40 pieces of paper are needed, how many pens will be used when 240 pieces of paper are needed?

Scarlett is trying to find the height of a dam. She stands 90 meters away from the dam and records the angle of elevation to the top of the dam to be 26º. Scarlett's height is 1.65 meters, so the height of the dam is () meters.

If a sample mean is 32, which of the following is most likely the range of possible values that best describes an estimate for the population mean?

A pair of shoes usually sells for $62. If the shoes are 40% off, and sales tax is 8%, what is the total price of the shoes, including tax?

In rotations, why is it that counter-clockwise rotations are positive and clockwise is negative? I need to know the history of it.

Evaluate - y + (-z) + 7 where y = 1 and z + 3

What are the solutions to the equation x - 7/x = 6? A) x=-7 and x = 1 B) x=-6 and x = - 1 C) x = - 1 and x = 7 D) x = 1 and x = 6

Convert 16.7 inches to yards

Evaluate the expression below when y = - 3. 2y + 7 -4y - 10 A. -1 22 B. -13 2 C. 1 2 D. 1

What is the prime factorization of 450

Crystal earns $5.25 per hour mowing lawns. Write a rule to describe how the amount of money m earned is a function of the number of hours h spent mowing lawns. how much does crystal earn if she works 2 hours and 15 minutes