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.
integral from 0 to 9 of 9/10 dx + integral from 9 to 10 of 9/10+ 4*(x-9)/10 dx
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random