Answer:
120
Step-by-step explanation:
8/3 is the slope
6⅔ minutes
Or, 6 minutes 40 seconds
X/10 + X/20 = X/T
(2X+X)/20 = X/T
3X/20 = X/T
3/20 = 1/T
T = 20/3
T = 6⅔ mins
x = 128
x and 128 are vertical angles
Vertical angles are equal