Solve the system of equations

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.

Find the measure of anglec in the following triangle

Three lines meet at a point. set up and solve an equation to find the value of (a) is your answer reasonable? explain how you know