Answer: scroll down to find out :)
Step-by-step explanation:
This isn't a hard equation, so I would just use the points and figure something out.
Some obvious points are (3, 6), (6, 12), and (7, 14). Immediately, we notice that the y coordinate is 2 times the x coordinate.
So, the equation would be y = 2x.
<em>P.S. Let me know if I got it wrong! I'll be more than happy to fix it :)</em>
Answer:

Step-by-step explanation:
What we're basically looking for here are ways to get 100 using these numbers.
My immediate first thought was "can we divide the 7's by some 7's to get 100?"
I know that
, so I had the idea to make it
. This means that we can use the number 7 four times in the equation
.
However, we're still missing a 1 that we need to include. This is easy, we can just multiply
by 1.
So in conclusion, we get 
Hope this helped!
130-104=26
26/130=0.2
0.2=20%
Tomas will get a 20% discount if he buys the bat.