(! ) david hikes 2.25 miles in 0.5 hr. what is his rate in miles per hour? at this rate, how long will it take him to walk 18 miles? if he walks for 7 hours, how far will he have gone?

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !