Monica, still, takes one hour to wash a car and Bill takes two hours to wash a car.  If they work together, how long will it take them to wash one car?

Jessica has twice as much money as Matthew. Jessica has four times as much money as Sam. Sam has $7 more than Andrew. Matthew has $28.  How much money do Matthew, Andrew, Sam, and Jessica have all together?

The U-Drive Rent-A-Truck company plans to spend $15 million on 310 new vehicles. Each commercial van will cost $35,000, each small truck $70,000, and each large truck $60,000. Past experience shows that they need twice as many vans as small trucks. How many of each type of vehicle can they buy? They can buy vans, small trucks, and large trucks.

The U-Drive Rent-A-Truck company plans to spend $8 million on 280 new vehicles. Each commercial van will cost $25,000, each small truck $30,000, and each large truck $40,000. Past experience shows that they need twice as many vans as small trucks. How many of each type of vehicle can they buy? They can buy vans, small trucks, and large trucks.