Answer:
1/3
Step-by-step explanation:
perpendicular lines have slopes that are opposite reciprocals
x^2+3x+2x+1 is meant to be x^2 +5x+1
31°
3x + 10 = 5x - 4 ... - 3x and +4 both side
14 = 2x
x = 7
angle 1 and angle 2: 5 x 7 - 4 = 31°
check: 3 x 7 + 10 = 31°
a dog
um approximatly 0.34519202904
