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Mumz [18]
3 years ago
7

A jar contains n nickels and d dimes. There are 30 coins in the jar, and the total value of the coins is $2.20. How many nickels

and how many dimes are in the jar?
Mathematics
1 answer:
Brums [2.3K]3 years ago
4 0

Answer:

16 Nickles and 14 Dimes

Step-by-step explanation:

What we know

  • n + d = 30
  • .05n + .1d = 2.2  (total change equals $2.20)
  1. (.05n + 0.1d = 2.2) -10
  2. -.5n - d = -22
  3. .5n = 8
  4. n = 16

     

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