Problem

QUESTION 7
10 points Save Answer
Use a proportion to solve the problem.
A math teacher claims that the students' test scores are directly proportional to the amount of time spent studying. Amy studies 17 hours for a test and gets a score of 69 . At this rate, how many hours would she have to study to get a score of 87 ?
\( 13.48 \mathrm{hr} \)
\( 21.43 \mathrm{hr} \)
\( 22.51 \mathrm{hr} \)
\( 35 \mathrm{hr} \)

Answer

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Answer

\( x = 21.43 \)

Steps

Step 1 ：\( \frac{69}{17} = \frac{87}{x} \)

Step 2 ：\( x = \frac{87 \times 17}{69} \)

Step 3 ：\( x = 21.43 \)

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