700x + 375(27 - x) = 15000
Solve for x
X=15 business class
Economy class 27-15=12
Here is your answer to the question
Answer:
The interest rate is 20%.
Step-by-step explanation:
In order to calculate the interest rate, we need to compute how many percents the value he recieves is related to the total he invested. In this case he recieves 40 every year and he invested 200, to calculate that we will apply a rule of three. We have:
$200 -> 100%
$40 -> x%
200/40 = 100/x
200*x = 40*100
200*x = 4000
x = 4000/200 = 20
The interest rate is 20%.
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Hope it helped. Don't forget the arrows at the ends or els it will be wrong.
