The last set (choice D) is a subset of given set B.
The other 3 choices are wrong.
Answer:
1.971
Step-by-step explanation:
7.211 - 5.24 = 1.971

It's a slope-intercept form where a slope = -1.5 and y-intercept = 3.
x - intercept: y = 0
Therefore we have the equation:
-1.5x + 3 = 0 |-3
-1.5x = -3 |:(-1.5)
x = 2
Answer: x-intercept = 2, y-intercept = 3
If we let
be the number of pages read in 1 hour, then in 7 hours Doug reads
pages. We know that this number of pages is 231, so we have

40,023,032 = 40,000,000 + 20,000 + 3,000 + 30 + 2