Need help with math problem!!

Answer : D
Line segment D to B is a 180 degree line. We know that C is 70 degrees. To get the degree measurement inside the triangle, alternative to the value of C, you have to subtract 180 and 70 to get 110. Now we know that the missing value next to angle C is 110. We are also given the value of angle A, 20 degrees. We know that a triangle has a total of 180 degrees. We add 110 and 20 together to get 130. We want the kids in value of angle B, in other words x. Therefore we subtract 180 and 130 to get 50.

The answer is 6 weeks

The correct answer is 10%