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posledela
3 years ago
14

Help help help help help help help

Mathematics
2 answers:
vova2212 [387]3 years ago
4 0
All together there are 48 + 30 books, which comes out to 78 books.  All discount packages contain the same number of books.

Think of the products of integers equal to 48:  3*16, 4*12, 6*8.  Are there more?

Think of the products of integers equal to 30:  3*10, 5*6, 2*15.  Are there more?

Think what these sets of factors have in common:  there could be 8 packages of 6 science books (48 books total); there could be 5 packages of 6 mysteries (30 total).   Doing this, we ensure that every package has the same number of books (6).  We can make (8+5), or 13, packages.

Check:  Does (6 books/package)(13 packages) = 78 books?  YES.
attashe74 [19]3 years ago
3 0

Answer:

6

Step-by-step explanation:

78/6=13

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First we need to know how many people were asked - 120 + 630 = 750 people
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Divide the fractions - 120/750 = 0.16 and 630/750 = 0.84
Multiply the results by 100 so we can get the percentage - 0.16 x 100 = 16% and 0.84 x 100 = 84%

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Step-by-step explanation:

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9/4y - 12 = 1/4y - 4

Step 2: Solve for <em>y</em>

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