11keeleylseabright 11keeleylseabright
  • 23-06-2020
  • Mathematics
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express in the form 1:n 5:15

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GeorgePP
GeorgePP GeorgePP
  • 23-06-2020

Answer: n = 3

Step-by-step explanation:

You could treat these two ratios as fractions

[tex]\frac{1}{n} =\frac{5}{15}[/tex]

There are multiple ways in which you can do this, but Im going to teach you the most reliable way. Do cross multiplication by multiplying each side by the others denominators. 15 x 1 and n x 5 to get:

5n = 15

Divide each side by 5 to get n = 3

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