Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(10x3 + 20x5 + 30x8 + 40m + 50x4) / (3+5+8+m+4)=31.852
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random