Question

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Cheryl is taking an online test that gives her instant results. After answering 16 questions, the test revealed that 10 were answered correctly. She

then answered I consecutive questions correctly and achieved her goal of 80% accuracy, Write an equation that can be used to determine how

many questions she answered correctly to reach her goal.

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L

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0.80 =

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Answer 1

(L + 10)/(L + 16) = 0.8

Explanation:

She needs to answer L more questions to get a grade of 80%.

When she answers L more questions correctly, she will have answered L + 10 questions correctly.

The total number of questions will be L + 16.

L + 10 must be 80% of L + 16

(L + 10)/(L + 16) = 0.8