Find all replacements (less than the modulus) for the question mark that make the statement true.2 - ? ? 9 (mod 9)
A. 7
B. 2
C. 4
D. 3
Answer: B
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Identify the equation as a parabola, circle, ellipse, or hyperbola.3x2 - y = 12
A. Ellipse B. Parabola C. Hyperbola D. Circle
Solve using Gauss-Jordan elimination. 6x + 4y = 0 4x + 2y = -2
A. (3, -2) B. (-2, -3) C. (-2, 3) D. No solution
Solve the problem.Tickets to a ballet cost $15 if bought in advance. If bought on the date of the ballet, they cost $24. For the ballet to make a profit, the total money collected from ticket sales must be at least $390. Write an inequality to represent this situation.
A. 15x - 24y ? 390 B. 15x - 24y ? 390 C. 15x + 24y ? 390 D. 15x + 24y ? 390
Simplify the expression. Write the answer with only positive exponents. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 