Find the equation of the circle satisfying the given conditions.Center: (0, 0), radius: 
A. x2 + y2 = 
B. x2 + y2 = 121
C. x2 + y2 = 11
D. x2 + y2 = 
Answer: C
Mathematics
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Solve the system by elimination.-7x - 6y = -13-3x + 3y = -39
A. {(7, -6)} B. {(6, -5)} C. ? D. {(7, -5)}
Mathematics
Rationalize the denominator. Assume all variables represent positive real numbers.
A. 
B. 
C. 1
D. 
Mathematics
Write the expression as a pure imaginary number.
A. -2
i
B. -2
C. 2
i
D. 2
Mathematics
Find a rational zero of the polynomial function and use it to find all the zeros of the function.f(x) = 3x4 + 16x3 + 56x2 + 56x + 13
A. {-1, + 
, -3 + 2i, -3 - 2i}
B. {-1, - 
, -2 + 3i, -2 - 3i}
C. {1, - 
, -2 + 3i, -2 - 3i}
D. {1, + 
, -3 + 2i, -3 - 2i}
Mathematics