7 I think, I’m sorry if I’m wrong

I only know this because I remember the common fractions, and 1/3 is .3333 repeating.
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
Plug in 0 into x of the equation y=2x+3, solve it, then take that answer and use that as your y then plug in the answer for y and solve for x. (i realized i am very bad at explaining this over this. Sorry I tried)
Answer:
53 degree
Step-by-step explanation:
i just subtracted it (linear pair axiom)