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2 answers:
<h2><u>Question</u></h2>
Molly has 18 coins, all dimes and nickels. The total value of the coins
is $1.05. How many of each type of coin does Molly have?
<u></u>
15 nickels
3 dimes
Let d represent the number of dimes
Molly has. Then she has 18-d nickels, and
the total value (in cents) of her coins is ..
5(18-d) +10d = 105
5d +90 105.... simplify
5d 15...
. . subtract 90
d 3.. ... divide by 5; number of
dimes
18-d 15... . . number of nickels
<u>Molly has 3 dimes and 15 nickels.</u>
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Answer:
You will pay $1,300 in interest.
The final price of the car is of $14,300
Step-by-step explanation:
Simple interest formula:
In which:
I is the interest
P is the principal(initial value of the investment, amount borrowed,...)
r is the interest rate, as a decimal
t is the time, in years.
In this question:
Borrow $13,000, so P = 13000
4 years, so t = 4
Interest rate of 2.5%, so r = 0.025
You will pay $1,300 in interest.
Final price of the car:
Principal plus interest.
The final price of the car is of $14,300