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Lelechka [254]
2 years ago
5

3. The value of x varies directly with y,

Mathematics
1 answer:
NISA [10]2 years ago
5 0

Answer:

70

Step-by-step explanation:

First you want to find the amount of x per 1 y so you divide 21 by 3 to get when x = 7 y = 1. Now you can just multiply 10 by 7 to get 70.

I hope this helps!

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The line shown represents the amount of money Ben owes on his lunch account.
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Step-by-step explanation:

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2 years ago
A bank loaned out $37,500, part of it at the rate of 11% annual interest, and the rest at 9% annual interest. The total interest
kondaur [170]

Answer:

The Loan amount at 11 % interest rate is $ 18,500   And

The Loan amount at 9 % interest rate is $ 19,000

Step-by-step explanation:

Given as :

Let The loan given at interest rate of 11 % annual  = $ x

And The loan given at interest rate of 9 % annual = ($37,500 - $ x)

Total interest fro both loan = $3745

I.e  CI 1 + CI 2 = $3745

Now, From compound interest method :

Amount= Principal\times (1 + \frac{Rate}{100})^{Time}

A 1 = $ 1\times (1 + \frac{11}{100})^{1}

Or,  A 1 = $ 1.11 x

<u>Similarly</u>

A 2 = ($37,500 -x ) \times (1 + \frac{9}{100})^{1}

Or, A 2 = 1.09 × ($37,500 - $ x)

∵  Compound Interest = Amount - principal

Or, $ 3745 = CI 1 + CI 2

Or,  $ 3745 = ($ 1.11 x - $ x) + ( 1.09 × ($37,500 - $ x) -  ($37,500 - $ x) )

Or,  $ 3745 = $ .11 x+  ($37,500 - $ x) ( .09 )

Or,  $ 3745 = $ .02 x + $ 3375

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∴   x = $ \frac{370}{.02}

SO,  x = $ 18,500

And $ 37500 - x = $ 19,000

Hence The Loan amount at 11 % interest rate is $ 18,500   And

           The Loan amount at 9 % interest rate is $ 19,000   Answer

4 0
3 years ago
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