- linear pairs are supplementary, meaning they add up to 180°
5x + 9 + 3x + 11 = 180
8x + 20 = 180
8x = 160
x = 20
- now plug in.
angle 1: 5(20) + 9 = 100 + 9 = 109°
angle 2: 3(20) + 11 = 60 + 11 = 71°
1/2 2/4 3/6
0.5 0.50 0.500
36 divided by 6
that equals 6
multiply 6 x 5
that equals 30
your final answer is: 30
*HOPE I HELPED!*