Posted by **Rose** on Monday, October 27, 2008 at 8:00pm.

if line segment AC =120ft and the ratio of line AB:line BC=3:5, what is the length of line AB ?

I set up the equation as x:120,3:5

x/120=3/5 3/120=360, 360 divided by 5=72

the answer in the book is 45, need help

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