Homework Help: math

Posted by lilly on Tuesday, November 9, 2010 at 10:07pm.

A map has a scale of 3 cm : 18 km. If Riversaid and Smithville are 54 km apart, then they are how far apart on the map?

how would I set the up as a proportion?

math - Ms. Sue, Tuesday, November 9, 2010 at 10:10pm
3/18 = x/54

Cross multiply and solve for x.
math - lilly, Tuesday, November 9, 2010 at 10:20pm
x=9?
math - Ms. Sue, Tuesday, November 9, 2010 at 10:25pm
Right. x = 9 cm

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