Answer:
Just 1 and 3! <3
Step-by-step explanation:
m∡A = 100°
m∡B = 50°
m∡C = 30°
let 'x' = m∡B; 50°
let '2x' = m∡A; 100°
let 'x-20' = m∡C; 30°
x + 2x + x - 20 = 180
4x - 20 = 180
4x = 200
x = 50
See https://web2.0calc.com/questions/help_29833.
-5
-5 is the slope because it is the multiplier of x
