Find the sum or difference. Write the answer in standard form, a + bi.(9 + 9i) - (-6 + i)
A. 3 + 10i
B. 15 - 8i
C. 15 + 8i
D. -15 - 8i
Answer: C
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Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(2, -2)}
B. {(-2, 2)}
C. no solution; ?
D. infinitely many solutions; 
or 
Find an equation of the line that has the given slope and contains the given point.m = -2, (5, 6)
A. y = -2x - 16 B. y - 6 = mx - 5 C. y = -2x + 16 D. y - 6 = x - 5
Find the sum, if it exists.0.5 + 0.05 + 0.005 + 0.0005 + . . .
A. 
B. 
C. 
D. Does not exist
Provide an appropriate response.The curves y = ax2 + b and y = 2x2 + cx have a common tangent line at the point (-1, 0). Find a, b, and c.
A. a = 1, b = -1, c = 2 B. a = 1, b = 0, c = 2 C. a = -1, b = 1, c = -2 D. a - 2, b = 1, c = -1