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

Question

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] · Answer 1 · 2022-03-09T20:52:07+03:00

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)
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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] · Answer 2 · 2022-03-09T22:26:09+03:00

Greeley [361]3 years ago

4 0

Answer: the answer is A

Step-by-step explanation:

I just took the edge quiz