I got 5 times 45 because I multiplied by 5 to get my answer.
Supplementary angles
x+20+5x+10=180
6x+30=180
6x=150
x=25
I think it’s 3.2 but I don’t know
Answer:

Step-by-step explanation:
Since the slope is -5 is either C or D. Let's replace
in either to see what we get.
C:
Nope.
D:
Good!