Answer:
13.615
Step-by-step explanation:
Supplementary angles
x+20+5x+10=180
6x+30=180
6x=150
x=25
slope = - 
calculate the slope m using the gradient formula
m= (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (- 3, 6)
m =
=
= - 
Answer:
x
Step-by-step explanation: