Answer:
19. x=28°
<E = 67°
20. x= 9°
<L = 25°
Step-by-step explanation:
19. Supplementary means that the angles will add to make a straight line, or they will add to = 180
<L+<E = 180°
4x+1°+3x-17°=180°
7x-16°=180°
7x=196°
x=28°
Measure of Angle E
<E = 3x-17° = 3(28°)-17° = 67°
20. Vertical angles are congruent, or equal to each other.
<L = <E
2x+7° = 4x-11°
2x+18° = 4x
18° = 2x
9° = x
x = 9°
<L = 2x+7° = 2(9°)+7° = 18°+7° = 25°
