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2 years ago

What is the value of k in the equation below? 5k - 2k = 12? 1 1/5, 1 5/7, 3, 4

2 answers:

8 0

Hi there!

5k - 2k = 12
Solve for K
3k = 12
Divide both sides by 3
3k/3 = 12/3
k = 4
The correct answer is : 4

I hope that helps!
Brainliest answer :)

kondaur [170]2 years ago

3 0

Answer:4

Step-by-step explanation:

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Since we are talking about compounded annual interest, we can use the Exponential Growth Formula to calculate the answer for this question.

$y = a* (1+r)^{t}$

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r is the interest rate in decimal form
t is the amount of time

First we need to calculate the total after 2 years with a 9% interest.

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$y = 1000* (1.09)^{2}$

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So after 2 years there will be £1,188.10 in the account. Now we can add £3000 to that and use the new value as the initial amount, and calculate the new total in 5 years.

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So now we can subtract the £4000 purchase from the amount currently in the account, and calculate one more year of interest with the new initial amount.

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