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7 votes
7 votes
This one is different than the other one so I’m confused it’s geometry

This one is different than the other one so I’m confused it’s geometry-example-1
User Singulus
by
3.1k points

1 Answer

17 votes
17 votes

Solution:

According to the information given in the problem, we get the following equation:


(ER)/(30)=(13)/(65)

By cross-multiplication, we get:


(ER)(65)=(13)(30)

this is equivalent to:


(ER)(65)=390

solving for ER, we get:


ER\text{ =}(390)/(65)=6

so that, we can conclude that the correct answer is:


6

User RoboYak
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3.3k points