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 If the ratio of a to b is 5/7. when b=9, what is the value of a to the nearest tenth?

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If the ratio of a to b is 5/7. when b=9, what is the value of a to the nearest tenth?
 Oct 16, 2014

Best Answer 

 #1
avatar+23254 
+5

a/b  =  5/7

a/9  =  5/7

cross multiply:               7·a  =  9·5

                                      7a  =  45

divide both sides by 7:       a  =  45 / 7

 Oct 16, 2014

1+0 Answers

 #1
avatar+23254 
+5
Best Answer

a/b  =  5/7

a/9  =  5/7

cross multiply:               7·a  =  9·5

                                      7a  =  45

divide both sides by 7:       a  =  45 / 7

geno3141 Oct 16, 2014

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