The formula for slope is 
In this case:

so...


-1 <<<The slope
Hope this helped!
~Just a girl in love with Shawn Mendes
-3x+13=16
Move +13 to the other side. Sign changes from +13 to -13.
-3x+13-13=16-13
-3x=16-13
-3x=3
Divide by -3 for both sides.
-3/-3x=3/-3
Cross out -3 and -3, divide by -3, then becomes 1*1*x=x
x=-1
Answer: x=-1
3/4 feet
You can set this up as an equation and solve

Answer:
45°
Step-by-step explanation:
Using the cosine ratio in the right triangle
cosB =
=
=
, hence
B =
(
) = 45°