The Acting Conservatory is running a concession stand at a showcase. They are selling a bag of popcorn for $1.50 each and Skittles for $0.50. At the end of the night, they made a total of $78.50. They sold a total of 87 bags of popcorn and Skittles combined. Write a system of equations to best represent the constraints of the situation. Be sure to define all your variables. Do not solve the system--just represent it algebraically.

The monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition