Answer:
1.2000 * 10^4
Step-by-step explanation:
I would make both denominators the same, and the lowest one that works is 18. So I'd make 1/9 into 2/18, and 1/6 into 3/18. They already used these times so combine them to make 5/18 then subtract that from the total time they had (18/18) and you would get 13/18 they spent playing music.
The formula to find slope it (y2-y1)/(x2-x1)
(2,4) is the first point
(6,2) is the second point
(2-4)/(6-2)
-2/4 which can be simplified to -1/2
Hope this helps
Get a math app, and get the answers from it. some will show you step by step