Question

Show Your Knowledge

Answer 1

9514 1404 393

Answer:

• 15 nickels
• 3 dimes

Step-by-step explanation:

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

Molly has 3 dimes and 15 nickels.

Answer 2

Question

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?

$\huge\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}\star$

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

Molly has 3 dimes and 15 nickels.