Simplifying Equations Practice Test

Dave starts biking at miles per hour. an hour later, his friend Mike starts biking after him from the same starting point at miles per hour. How long does it take Mike to catch up to Dave?

Brian places an order for pairs of socks and belts at a total cost of . Danny places an order at the same store for pairs of socks and belts, at a total of . What is the cost for a single pair of socks and a single belt?