you spend $30.40 on 4 CDs. Each CD costs the same amount and is a on sale for 80% of the original price. Write and solve an equation to find out how much you spend on each CD.

Given f(x) = 10x + 4 and g(x) = 3x - 8, what is f(x) + g(x) ? - 7x - 4 - 13x + 4 - 7x + 4 - 13x - 4

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

Acircle has a circumference of 28.36 units what is the diameter of the circle