+82 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.
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!!!!
+82 For 3, I got 12/29. Please point out any mistakes I might have made. Thanks,
+2446 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.
