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Question on II-A 3.18

 
 
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Question on II-A 3.18
by Bober Yang - Saturday, 3 October 2020, 9:46 AM
 

So this question is asking for the y vale of point B

But i don't know the value for x

do I write the value of y in terms of x?

because I got y=13(x-4)/2+5


Thanks