Solve. x2 - xy + 3y2 = 32x2 - 3xy + 4y2 = 3
A. (-1, 1), (1, -1), (2, 0), (0, -2)
B. (2, 0), (0, -2)
C. (1, 1), (-1, -1)
D. (1, 1), (-1, -1), (2, 0), (0, -2)
Answer: C
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A. 5 B. 12 C. 4 D. 2
Solve the problem.There are 3 balls in a hat; one with the number 1 on it, one with the number 4 on it, and one with the number 7 on it. You pick a ball from the hat at random and then you flip a coin. Using a tree diagram , obtain the sample space for the experiment. Then, find the probability that the number on the ball is greater than 6.
A. 
B. 
C. 
D. 
Divide.63 ÷ 9
A. 54 B. -54 C. -7 D. 7
Solve the problem.If a polygon, of n sides has 
n(n - 3) diagonals, how many sides will a polygon with 230 diagonals have?
A. 23 sides B. 25 sides C. 22 sides D. 24 sides