Answer:

That is what the expression would be
Answer:
2a^2 - a - 2
Step-by-step explanation:
The intersection is at (2,-1)
Answer:
The point 9,50
Step-by-step explanation:
All the other ones are within a reasonable distance of each other.
Since there are 3 sides and each of those 3 sides are 9 cm, you would multiply 9*3 and your answer would be 27 cm.