angle1 = 4y - 9°
angle2 = 40°
angle3 = 5y°
Angle sum property
180° = angle1 + angle2 + angle3
Therefore,
180 = (4y - 9) + 40 + 5y
180 = 4y - 9 + 40 + 5y
180 = 9y + 31
180 - 31 = 9y
149 = 9y
149/9 = y
6x-12=4x+10
2x-12=10
2x=22
x=11
11 because you would add the 14 and 2 which would be 9^16 then you would subtract 5 which would make it 9^11
Answer:
Collins walked an average of 8.3 miles per hour
