I don’t know which one is correct. A) a=80
b=100

B) a=60
b=120

C) a=70
b=110

D) a=72
b= 108
Please help thank you

Your right the answer is B a=60 , b=120

A ratio of 1:2 just means one value is twice that of the other.

B (a=60, b=120)

Step-by-step explanation:

1. m∠AOB = 180°

2. Since the ratio of a to b is 1:2, set the measure of a as x, and the measure of b as 2x.

3. a+b = 180, so x+2x = 180, 3x = 180, x = 60

4. x = a, so if x=60, then a = 60

5. if b=2x, then b = 2a, which is 2*60 = 120

Hope this helps

answer: howdy

step-by-step explanation:

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it