Explanation:
Angles 1 & 2 have to equal 180. So, if ∠1 is equal to 140, ∠2 is equal to 40 because 140 + 40 = 180.
So far... we know that:
Angles 2, 9, and 11 make a triangle, a triangles "magic number" is also 180. To get 180, you must add up all of the angles. Well... we don't know ∠11 so to find it, you subtract 40 & 80 from 180. 180 - 80 - 40 = 60.
Answer:
∠2 = 40
∠11 = 60
4(4a+5) means the GCF would be 4
Video to help you: https://learnzillion.com/lesson_plans/4860-find-the-gcf-of-two-numbers-using-the-distributive-property
I think you take 12.01 and multiply by "h" the hours, and then 4.05 by "x" for the people signing up. So I think it is 12.01h+ 4.05a. Does that sound right? You probably know this better than me ;)
D. The standard deviation is the best measurement of spread for games and movies.
