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lana [24]
3 years ago
13

Which equation can be used to find the area of the rectangle? A. A=9+4 B. A=1/2 (9)(4) C. A=9+9+4+4 D. A=(9)(4)

Mathematics
1 answer:
valentina_108 [34]3 years ago
6 0

Answer:

D. A=(9)(4)

Step-by-step explanation:

area= length x width = 9x4

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There are 12 paperback mysteries on a shelf. This is 40% of the books on the shelf.
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Answer:

There are 30 books in the shelf.

Step-by-step explanation:

To solve this problem we can use a rule of three in such a way that 12 paperback mysteries are related to 40% of the books in the shelf in the same proportion that "x" total books are related to 100% of the books in the shelf. So we have:

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