Answer:

Step-by-step explanation:
The side that is parallel to BC is EF
Find the slope of EF:

Easiest way is just put the formula in point-slope form and simplify.
Let's use point F, which is (6,2)

Simplify:

Add 2 on both sides:

Hope this helped
Answer:
y=1
Step-by-step explanation:
17 out of 20 is 85 percent.
No, because it is not per second. You would have to simplify to per one second for it to be a unit rate. Hope it helps! :)
One way to solve:
960-12x=816
144=12x
12=x
Another way to solve
80-x=68
x=12