This one is tricky....but I'll go for D cause your multiplying a number towards 5
Answer:
n = 8
Step-by-step explanation:
Complementary angles add up to 90°
So,
59° + (4n - 1) = 90°
4n - 1 = 90° - 59° = 31°
4n = 31° + 1° = 32°
4n° = 32°
n = 32 ÷ 4 = 8
1. 3 + 6 + 9 = 18
18/3 = 6 --> The average is 6
2. 15 + 5 + 8 + 4 = 32
32/4 = 8 --> The average is 8
3. 6 + 10 + 5 = 21
21/3 = 7 --> The average is 7
4. 14 + 9 + 7 = 30
30/3 = 10 --> The average is 10
