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zloy xaker [14]
3 years ago
14

Indira has 18 coins valued at $4.20. she has only quarters and dimes. Which augmented matrix can be used to determine the number

of quarters and dimes in the collection?
Mathematics
2 answers:
Delvig [45]3 years ago
6 0
To solve this problem, you can use a simple table to find the number of quarters and dimes:

 type of coin       I  Quantity of coin  I  Value of coin (in amount of money)
------------------------------------------------------------------------------------------------------
 dimes                I   x                        I  10x (a dime is equal to 10 cents)
------------------------------------------------------------------------------------------------------
  quarters           I   18-x                   I   450-25x (a quarter is equal to 25 cents)


After doing this table, you can form the equation:

10x + 450 - 25x = 420

-15x = -30

x = 2 dimes
18-x = 16 quarters
Greeley [361]3 years ago
4 0

Answer: the answer is A


Step-by-step explanation:

I just took the edge quiz

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