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Tanya [424]
3 years ago
10

Which number can not be used to write related number sentences? explain. 5 7 9 14

Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
4 0
The number 7 cannot be used to write related number sentences because it wouldn't fit into the equation & make it true. 
9 + 5 = 14
5 + 9 = 14
14 - 5 = 9
14 - 9 =5
Nowhere in any of these equations can the #7 go in, & make these number sentences true. 
Hope this helps & makes sense ! (:
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5 0
3 years ago
The question is attached
DerKrebs [107]

cos(A - B) = cos A cos B + sin A sin B

In this case, A is \frac{\pi }{3} and B is \frac{\pi }{5}, so:

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Hope that helps!

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4 0
3 years ago
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Read 2 more answers
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