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Grace [21]
2 years ago
12

In two or more complete sentences write and solve an equation for the situation and explain how you will solve the equation. Fif

ty students were given a pre and post test for their math course. Overall, most students increased their scores by 20% points. The grades on the post test went up to 95%. What is the starting range for the grades on the test?
Mathematics
1 answer:
miv72 [106K]2 years ago
6 0

We conclude that the starting average grade is 79.17%

<h3>How to write the equation and solve it?</h3>

There are 50 students, let's say that the grades are measured between 1% and 100%.

And the average grade of the 50 students is A.

We know that after it increased by 20%, the average of the grades is 95.

Then we just need to solve the percentage equation:

95 = A*(1 + 20%/100%) = A*(1.2)

95/1.2 = A = 79.17

We conclude that the starting average grade is 79.17%

If you want to learn more about percentages:

brainly.com/question/843074

#SPJ1

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2 years ago
Colleen took out a 30 year loan for $145,000 at and apr of 4.5% compounded monthly. Approximately what would the be total cost o
Marrrta [24]

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total cost of her loan be if she paid it off 8 years early $389,507.11

Step-by-step explanation:

The formula for annual compound interest, including principal sum P, rate of interest r, number of years t, and  the number of times that interest  is compounded per year is n:

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4 0
3 years ago
Read 2 more answers
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