write and solve an equation for each problem. The perimeter of a rectangle is 30 inches. If its length is three times its width, find the dimensions

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.

Through non-collinear points there is exactly one plane.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)