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I need the value of x.

 

 Jan 13, 2020
 #1
avatar+107405 
+2

We can use the tangent-secant theorem to solve this

 

We have that   

 

y^2  =  7 ( 7 + 15)

y^2  =  7 (22)

y^2  =  154

 

And applying this once more, we have that

 

y^2  = 5 ( 5 + x)

154  = 25 + 5x     subtract 25 from both sides

129 = 5x             divideboth sides by  5

129/5   = x  = 25.8

 

 

 

cool cool cool

 Jan 13, 2020
edited by CPhill  Jan 15, 2020

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