+0  
 
0
36
4
avatar

Find y.  Simplify completely.

 

 Nov 12, 2020
 #1
avatar+452 
+3

y / 20 = 4 / y

 

y2 = 80

 

y = √80

 Nov 12, 2020
 #2
avatar+93 
+3

@AboveGuest Very clever method... I didn't even think of using similar triangles!

 

Expanding on the solution, $\sqrt80$ can be simplified to $4\sqrt{5}$, so the number that goes in the green box is 4.

 Nov 12, 2020
 #4
avatar+452 
0

Thanks!

You did something clever right here:> https://web2.0calc.com/questions/pre-cal-need-helpsmiley

jugoslav  Nov 13, 2020
 #3
avatar+111600 
0

I like your answer too guest.

It was good that you left it not quite finished too.

 

I like that Eternity bought my attention to your solution too.  

I do not think of similar figure solutions as often as I should.  It is good to get reminders of them.

 Nov 12, 2020
edited by Melody  Nov 12, 2020
edited by Melody  Nov 12, 2020
edited by Melody  Nov 12, 2020

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