Solve the equation by the square root property. If possible, simplify radicals or rationalize denominators. Express imaginary solutions in the form 
13x2 - 2 = 0
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = cos-1
A. 1
B. ?
C. 
D. No limit
Mathematics
Evaluate the expression.-73
A. 21 B. -21 C. -343 D. 343
Mathematics
Use a graphing calculator to solve the system by finding A-1 and A-1B. (Round to the nearest integer if necessary.)
A. {(5, -2, -5)} B. {(2, 5, 2)} C. {(6, 0, 5)} D. {(5, 2, 5)}
Mathematics
The premises A, B, and C are followed by a conclusion. Check whether the resulting argument is valid or invalid.A. All people who laugh have fun.B. All people who have fun are content.C. Some people who stay up all night are content.Some people who have fun stay up all night.
A. Valid B. Invalid
Mathematics