Using Cramer's Rule, what is the value of x in the solution to the system of equations below? -x-3y=-3
-2x-5y=-8

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount

Which rule describes the composition of transformations that maps △abc to △a”b”c