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aivan3 [116]
3 years ago
10

SAVE ME PLS

Mathematics
1 answer:
Andrej [43]3 years ago
6 0

Answer:

81

Step-by-step explanation:

Set up a proportion to find how many total students there are [notice how females are on top and totals are on the bottom of the ratios]

\frac{4}{9} = \frac{396}{x} so cross multiply 4x = 396(9) so x = 891, if there are a total of 891 students and you need 1 teacher per 11 students then take 891/11 so you need 81 teachers.

You could set up another proportion 1/11 = x/891

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Write an explicit formula for an arithmetic sequence whose common difference is -4.5
makvit [3.9K]
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Hope this helps!
3 0
3 years ago
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Answer:

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3 years ago
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4 years ago
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sveta [45]

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We move all terms containing x to the left, all other terms to the right

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x=1+5/7We move all terms to the left:

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We add all the numbers together, and all the variables

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x=-12/-7

x=1+5/7

6 0
3 years ago
Read 2 more answers
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