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hodyreva [135]
3 years ago
9

How do I solve ........

Mathematics
1 answer:
sasho [114]3 years ago
6 0

Answer:

Just plug in 10^2-7.5^2

To get 43.75

Step-by-step explanation:

I hope you figure this out.

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The amount invested in the account that yields 7% interest is $4000.

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<h3>What are the linear equations that represent the question?</h3>

a + b = 5000 equation 1

0.07a + 0.12b = 400 equation 2

Where:

a = amount invested in the account that yields 7% interest.

b =  amount invested in the account that yields 12% interest.

<h3>How much is invested at each rate?</h3>

Multiply equation 1 by 0.07

0.07a + 0.07b = 350 equation 3

Subtract equation 3 from equation 2

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b = 1000

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