multiply by 8 on both sides
(20)8 - 8(4b/8) = (18)8
160 - 4b = 144
subtract 160 on both sides
160 - 160 - 4b = 144 - 160
-4b = -16
divide by -4 on both sides
-4b/-4 = -16/-4
b = 4
D) because a straight line has an infinite solution
Both cosθ and sinθ are negative so θ is in the third quadrant ( tan<span>θ is positive)
</span>
tan<span>θ = 5/12
</span>
The greatest common factor of 36x3 and 8x is simply 4X
