5 (- 9) + 12, t = 20
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Using simple interest, it is found that $13,872 was loaned at 9%.
<h3>Simple Interest</h3>The amount of money after t years in simple interest is modeled by:
In which:
- P is the initial amount.
- r is the interest rate, as a decimal.
The interest earned is:
A bank loaned out $14000, in two parts, hence:
Part of it at the rate of 9% per year and the rest at 17% per year, hence:
The interest received in one year totaled $2000, hence:
Then:
Isolating as a function of
, then we can replace on the equation for the first interest.
Then:
$13,872 was loaned at 9%.
To learn more about simple interest, you can take a look at brainly.com/question/25296782
To answer this question we will have to keep the following two points in mind:
#1. The <u>sum</u> of a number with another number means to <u>add </u>the given two numbers.
#2.<u> Twice</u> means to <u>multiply by 2.</u> In other words it means to double.
Therefore, "twice the sum" would mean to multiply the sum by 2.
Now, in our question we will have, "the sum of y and 9 would be: and twice this sum would be:
Thus, "twice the sum of y and 9" is: