If you meant -3x then the answer is (2,12)
If the angle is over 120 its obtuse is it if below 40 its acute
The sequence is alternatingly decreasing and increasing.
3 - 9 = -6
-6 + 18 = 12
12 - 8 = 4
4 + 16 = 20
Therefore, next term will be:
20 - 7 = 13
Answer: 21.182
Step-by-step explanation:
