This is a practice quiz. I know the correct answer is 17, but I need to know how to do the problem. Please help! I had to shorten it to fit. Hopefully it makes sense!

Grade 11 stuff.
1. Suzie buys a new computer for $2500. She pays $700 and finances the rest at $75.84 per month for 2 and a half years. What annual interest rate, compounded monthly,...

Robin has a collection of nickels, dimes, and quarters worth $57.50. She has 20 more dimes than nickels and twice as many quarters as dimes. How many coins of each kind does she have?

A student bought 20 first stamps and 10 post card stamps for $17.10.
Another day she spent $70.00 on 80 1st class stamps and 50 post card stamps.
Find the cost of each type of stamps...

A can of soda at 83° F. is placed in a refrigerator that maintains a constant temperature of 37° F. The temperature T of the soda t minutes after it is placed in the refrigerator is given by
T(t)...

1)Donut Delights, Inc. has determined that when x donuts are made daily, the profit P is given by
P(x)=-0.002x2+4.3x-130
a) How is the company's profit if 700 donuts...

1)A car company charges $31 per day to rent a particular type of car and $0.16 per mile. Juan is charged $47.96 for a one day rental. How many mile did he drive?
a)121mi
b)106mi
c)300mi
d)269mi
2)...

A house costs $145,000 and it is appreciating by 14%. How much will it be worth 3 months from now? How much will it be worth 1 year from now?
Algebra 2

A game has a deck of cards that are colored red, blue, yellow, and green. Shawn has 5 cards in his hand. If Shawn’s cards are only blue and yellow, how many different combinations of blue...

Car payments: Charlie borowed $11,500 to purchase a new car. His loa. Requires him to pay $288.65 each month over the next 60 months(five years). How much will he pay over the five years? How much...

A team practices at least 2 times/week for 5 weeks. Each practice is 45 minutes. Coach used table below to record number of practices and amount of time practiced each week:
Week/ #...