Unit Review 1. A bag contains two green marbles, three yellow marbles, one blue marble,
and six red marbles.
a. What is the theoretical probability of randomly drawing a blue marble
from the bag?

, or 1:12

Step-by-step explanation:

find the ratio of wanted outcomes to the total amount of outcomes.

1: 2+3+1+6

1:12

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

3

step-by-step explanation: