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Alex73 [517]
3 years ago
9

There are

Mathematics
2 answers:
Archy [21]3 years ago
7 0
17 books in total, and 8 new. To find the number of used books, we subtract 8 from 17.

17-8= 9 used books

Now we have 8 new books and 9 used books.

All books: 17
Used books: 9
New books: 8

(a) all books: used books
     17: 9

(b) new books: used books
     8: 9
IgorC [24]3 years ago
6 0
17 books
You would do 17-8
= 9 used books
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3 years ago
in a given classroom the number of girls is 10 greater than number of boys if the ratio of the number of girls to the number of
Xelga [282]

Answer:

a) 35,  b) 25,  c) 60

Step-by-step explanation:

The number of girls is 10 more than the number of boys, so it's a good thing to choose a variable to represent the number of boys.

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Number of girls:  b + 10

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\frac{b+10}{b}=\frac{7}{5}

"Cross multiply" to get

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There are 25 boys.  There are 10 more girls, so the number of girls is 35, and the total number of students is 60.

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3 years ago
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Leni [432]

So, the right option is 1. so if my ans was helpful u can follow me.

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