In a triangle, the sum of the interior angles is 180.
So, you have

Plug the values for angles A and C:

How many students had 3 or more absences? Add together {45%, 21%, 23%} and subtract that sum from 100%: 11%.
How many students had two or more absences? Add together this 11% and 21%: 32% had two or more absences. Let the total number of students be n. Then 32% of these n students add up to 96 students. Thus, 0.32n = 96, and n= 300.
How many students had one absence? The chart shows that that is 45%, and we know that there are 300 students total.
Thus, the number of students who had one absence was 0.45(300) = 135.
The answer is 11.
Step-by-step explanation:
19-25\19-15
44/4= 11
Answer:
-21m+28
Step-by-step explanation:

Hope this helps.
Answer:
2%
Step-by-step explanation: