9. 20 because a bisector divides an angle into two equal angles
Answer:
B
Step-by-step explanation:
Angles a and b are complementary angles because they both add up to 90 degrees, which fulfills the definition of complementary.
Interval notation(-infinitive, -4)
3.25 - 3 = 0.25
3 - 2.75 = 0.25
2.75 - 2.5 = 0.25
2.5 - 2.25 = 0.25
Since we subtracted those numbers, it means we are decreasing.
Therefore, the answer is decrease by 0.25.