Elsa took out a $6000 loan for 5 months and was charged simple interest. The total interest she paid on the loan was $195. As a percentage, what was the annual interest rate of Elsa's loan?

the annual rate of interest is 7.8%

Step-by-step explanation:

The computation of the annual rate of interest is as follows:

As we know that

Simple interest = Principal × rate × time

$195 = $6,000 × rate × 5 months ÷ 12 months

$195 = 25 × rate

Rate =  $195 ÷ 25

= 7.8%

Hence, the annual rate of interest is 7.8%

We simply applied the above formula so that the correct value could come

And, the same is to be considered

c is the correct answer

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15