Asked by Rose
                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
            
        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
Answers
                    Answered by
            Reiny
            
    It should have been x/120 = 3/8
which gives x = 45
notice AB:BC = 3:5
so AB could be 3 units, BC 5 units, making AC 8 units.
    
which gives x = 45
notice AB:BC = 3:5
so AB could be 3 units, BC 5 units, making AC 8 units.
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