When Andrei surveyed 36 random seventh-grade students in the lunchroom, he found that 7 out of 9 would like to try or have alrea
dy tried snorkeling. Using proportional reasoning, about how many of the 810 seventh-grade students in his school would like to snorkel?
2 answers:
Answer:
630
Step-by-step explanation:
The ratio of students that would like to try or already have tried snorkeling is 7/9.
The ratio of all students is an unknown amount out of 810 total students; this gives us x/810.
This gives us the proportion:
7/9 = x/810
Cross multiplying,
7*810 = 9*x
5670 = 9x
Divide both sides by 9:
5670/9 = 9x/9
630 = x
Answer:
Answer is C
Step-by-step explanation:
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156
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s8 = n/2 [2t + (n-1)(d)]
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