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Leno4ka [110]
3 years ago
12

Solve the proportion.8/d = -12/30A. -45B. -20C. -3.2​

Mathematics
1 answer:
tamaranim1 [39]3 years ago
6 0

Answer:

B. -20

Step-by-step explanation:

8/d = -12/30

We can use cross products to solve

8 * 30 = d* -12

240 = -12 d

Divide each side by -12

240/-12 = -12d/-12

-20 = d

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3 years ago
Some friends of yours collected books for a book drive. They collected 64 Fiction, and 48 Non-Fiction books. They asked you to m
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As all of the bundles have the same content inside, so assuming that there is x number of Fiction books and y number of Non-fiction books in each bundle.

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also, there are 48 Non-Fiction books, so

ny=48 ...(iii)

Or y=48/n ...(iv)

Observing that the numbers x, y, and n are counting numbers and from equations (i) and (iii), n is the common factor of 64 and 48.

The possible common factors of 64 and 48 are,

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So, my team can send 1,2,3,4,8 or 16 bundles of books.

Now, from equations (ii) and (iv),

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So, for 1 bundle the number of Fiction and Non-fictions books are 64 and 48 respectively.

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So, for 4 bundles, the number of Fiction and Non-fictions books are 16 and 12 respectively.

For n=8:

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So, for 8 bundles, the number of Fiction and Non-fictions books are 8 and 6 respectively.

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Answer:

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