A playground has the shape of a triangle. The sides of the playground are expressed as 3x + 2, 4x - 9, and 5x + 1, and the perimeter of the playground is 66 yards. What is the measurement of the longest side of the playground in yards?

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

Yvaries inversely as x. y =12 when x=5. find y when x=4

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)