Ammarah
Given CB/BA = DE/EF, find BA.



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Hero
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Hint:
BA/CB = EF/DE

Ammarah
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no i need help on anothe rquestion

Ammarah
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not this one

Ammarah
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2/a4=3/9

Ammarah
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You need to solve the porportion.

Hero
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No I do not. You need to solve it. It is not hard. All you have to do is cross multiply.

Ammarah
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i did.

Ammarah
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dw:1354844110291:dw

Ammarah
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I this right?

Hero
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18 = 3(a  4)
18 = 3a  12
18 + 12 = 3a
30 = 3a
30/3 = a
10 = a

Ammarah
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thats what i did...