Every seventh-grade student at Martin Middle School takes one world language class. One-tenth of the seventh-grade students take French. Eighteen seventh-grade students take French. Which equation represents s , the total number of seventh-grade students at the middle school?
Answer
A
18 is equal to 0 point 1 s
B
10 s is equal to 18
C
18 is equal to 10 over s
D
s over 0 point 1 is equal to 18
Explanation
One-tenth of the total number of students is the number taking French. Since 18 students take French, the relationship is 0.1s = 18, or 18 = 0.1s. Choice A gives this equation; choice B incorrectly says 10 times the total is 18.
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