Shelly biked 21 miles in 4 hours (part a) what is shelly's average speed in miles per hour (part b) at the same rate how many hours will it take shelly to bike 42 miles.

Areal estate agent earns $32,000 a year plus $1,000 for each apartment he sells. write an equation that shows the relationship between the number of apartments abe sells, n, and the total amount he earns in a year, e. what is the total amount abe would earn from selling 10 apartments in one year

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.