Answer:
C and D
Step-by-step explanation:
Let's add this all together.
9x + 5y + x - 3y
Combine like terms 5y + -3y and 9x + x
10x + 2y
So we know D is at least correct.
What else? C is also correct, because we can expand it outward.
10x + 5y - 3y = 10x + 2y
A and B are not correct! We can't multiply the ys or the xs.
Answer:
-2
Step-by-step explanation:
divide -3 from both sides
Draw out a small graph and count the units of each side, then add all four numbers to get the perimeter.
Answer:
maximum value at (5, 9 )
Step-by-step explanation:
The vertex is the point on the graph where it goes from an increasing function to a decreasing function as x increases from left to right.
vertex = (5, 9 )
Since the function increases to the vertex then turns at the vertex and decreases.
It reaches a maximum value at the vertex of y = 9
