Ruben often orders party trays from his favorite mexican food restaurant for company events. for a recent company party, he spent $280 on 3 burrito platters and 5 taco platters. for a company meeting, he spent $180 on 1 burrito platter and 5 taco platters. how much does each type of platter cost?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?