A mail carrier can deliver mail to 36 houses in 30 minutes. Mark wats to determine how many houses the carrier can deliver in 7.5 minutes at the rate. He thiks that to find the awnsers, he should do the following: 1. Divide 36 houses by 30 to find a unit rate of 1.2 houses per minute 2. Then multiply 1.2 houses per minute minute by 7.5 to get 9 houses.

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?