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Zepler [3.9K]
3 years ago
6

4) 10(–7 + a) = -40 ??

Mathematics
2 answers:
Nataliya [291]3 years ago
4 0
The answer is a=-110
mamaluj [8]3 years ago
4 0

Answer:

a = 3

Step-by-step explanation:

Start by dividing both sides of the equation by 10,

-7 + a = -4

Then add 7 to both sides,

a = 3

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Answer:

The student will have to reimburse 2,991.03 two years later.

Step-by-step explanation:

This is a compound interest problem:

The compound interest formula is given by:

A = P(1 + \frac{r}{n})^{nt}

In which A is the amount of money, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per unit t and t is the time the money is invested or borrowed for.

In this problem, we have that:

A is the amount the student will have to reimburse two years later.

P is his loan. so P = 2,500

The bank loans this money at a rate of 9 % capitalized monthly. This means that r = 0.09 and n = 12, since the money is compounded monthly, this means, 12 times in a year.

He will have to reimburse two years later, so t = 2

A = P(1 + \frac{r}{n})^{nt}

A = 2,500(1 + \frac{0.09}{12})^{24}

A = 2,991.03

The student will have to reimburse 2,991.03 two years later.

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3 years ago
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Step-by-step explanation:

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Work Shown:

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