+0  
 
0
494
9
avatar+81 

Thanks in advance!!!

1. 

I got a=20 and b=20, so 400, why isn’t it the largest already?

 

2.

Came up with:

If x is a number bigger than 15 and 20, then x can be the median or 25.
If x is bigger than 25, then 25 is the median
If x is the biggest number, then 25 is the median.
If x is the smallest number, then 20 is the median.

Then I don’t know...

 

 

3.

 Sep 28, 2018
edited by HelpPls  Sep 28, 2018
 #1
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0

1) 

I think a = 15  and   b=30..............and so: a x b = 15 x 30 = 450.

 Sep 28, 2018
 #3
avatar+81 
0

Um...15+2(30)=75, not 60...

HelpPls  Sep 28, 2018
 #2
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+1

mean {15, 20, 22, 25, 30} = 22.4

median {15, 20, 22, 25, 30}=22

 

Also, x=37 seems to work

mean {15, 20, 25, 30, 37}=25.4

median {15, 20, 25, 30, 37}=25

Note: there may others!!!!

 Sep 28, 2018
edited by Guest  Sep 28, 2018
edited by Guest  Sep 28, 2018
 #5
avatar+81 
0

Yep, there are others. I listed all of them out and got 12 too.

HelpPls  Sep 28, 2018
 #4
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+1

a=30 and b=15 =30 + (2*15) =60. So, ab =30*15 =450 !!!!!.

 Sep 28, 2018
 #6
avatar+81 
+1

Oh right. Thanks.

HelpPls  Sep 28, 2018
 #7
avatar+81 
0

For 3, I got 12/29. Please point out any mistakes I might have made. Thanks,

 

 Sep 28, 2018
 #8
avatar+2424 
+1

I think you made a mistake, HelpPls, but I am glad that you are attempting this. 

 

I noticed this error in your work:
 

\(\left(4\triangle\frac{3}{8}\right)=\frac{\sqrt{4*\frac{3}{8}}}{\left|4-\frac{3}{8}\right|}\Rightarrow\frac{\frac{3}{2}}{\frac{32}{8}-\frac{3}{8}}\)

 

The square root operator suddenly disappeared. Otherwise, though, I think you did well with evaluating this. 

TheXSquaredFactor  Sep 28, 2018
 #9
avatar+81 
+1

Ok thanks for telling me.

HelpPls  Sep 29, 2018

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