Answer:
Brad´s class has the lowest score
Step-by-step explanation:
first you can 1.9 7 times then you do it again but to the 10 power
x = 50°, y = 50°
⇒ x + x + 80° = 180°
⇒ 2x = 180° - 80° = 100°
⇒ x = 100°/2 = 50° ∴ y = x = 50°