Take a screen shot-- different operating systems have different directions -- you may have a "print screen" key or on a Mac, its command+shift+5, Chromebook it's ctrl+shift+ []|| The key above the 6 or F5 would be.
Anyway once that's done click on the paperclip icon, find the screenshot and attach it.
It helps to enlarge your screen so the screenshot contains the infromation large enough to read.
Distributive Property means you multiply each component by the value you are distributing in this case: (1/2)(10x) + (1/2)(20y) + (1/2)(10z) which will yield 5x+10y+5z
