krystelrustriap4mfs1 krystelrustriap4mfs1

05-04-2018
Mathematics

contestada

The ratio of books to magazines at jess house is 5:3 they are 21 magazines at jess house how many books are there?

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iTSjUstRyaNt iTSjUstRyaNt

05-04-2018

First, 5/3 = 1.6
21 x 1.6 = 34.99999999
But, when I put it in a calculator, the 1.6 was repeated so:
Round 34.99999999 to 35
35 books

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idkwhat1 idkwhat1

05-04-2018

It's the same as writing them as fractions
[tex] \frac{5}{3} = \frac{x}{21} [/tex]
x= books

Cross multiply.
5×21
And
3×x

[tex]105 = 3x[/tex]
divide 3 on both sides

x=35

Answer Link

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