27+3x-31=20
-4+3x=20
+4 +4
3x=24
X=8
Answer:
- increasing: (-∞, 0)
- decreasing: (0, ∞)
Step-by-step explanation:
The function goes up to the right until it gets to the vertex at x=0. Then it goes down to the right. That is, it is ...
increasing from -∞ to 0 (not including 0)
decreasing from 0 to +∞ (not including 0)
_____
At x=0, the function is neither increasing nor decreasing, so x=0 is not part of either interval.
A conjuate is real numbers like the conjuate of x and y would be a real number
I have no clue what to answer 9