Answer:
∠7 = 95°
Step-by-step explanation:
∠1 and ∠4 are vertical angles so they are equal.
so:
3x + 10 = 4x - 15
simplify:
x = 25°
∠4 = 4(25) - 15 = 85°
∠8 = ∠4 because they are corresponding angles
∠7 = 180° - 85° = 95° because they are supplementary angles (add together to = 180°)
