600 + 300 + 150 + . . . is a geometric sequence with a = 600 and r = 1/2
Sn = a(1 - r^n)/(1 - r)
S5 = 600(1 - (1/2)^5)/(1 - 1/2) = 600(1 - 1/32)/(1/2) = 1,200(31/32) = 1,162.5
Answer:
x = 20 and they are vertical angles
Step-by-step explanation:
2x = 40
x = 20
50 + 18 + (50 - 10) + (40 - 18) + 10 + 40 = 180
