Simplify.

Betty is working on increasing the number of minutes that she can run consecutively. Each time she goes for a jog she runs minutes longer than the previous time. She starts at minutes per jog. If she runs times per week, how long can she run after weeks?

Solve for :

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?

Simplify the equation and solve:

They say it takes , hours of practice to become an expert at something. If Anna practices piano times a week for minutes and Maggie practices piano times a week for an hour, who will hit , hours first? How many weeks will it take each girl?

Simplify

Simplify the equation:

Simplify:

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?