Use the Laws of Exponents to simplify. Write the answer with positive exponents. All variables are nonzero.
A. 
B. 
C. 
D. y13
Answer: C
Mathematics
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Evaluate by using polar coordinates.
A. 
B. 
C. 
D. 
Mathematics
Decide whether the ordered pair is a solution of the given system.(-1, 4)2x + y = 24x + 2y = 4
A. Yes B. No
Mathematics
Simplify the expression using the order of operations.28 + (15 ? 28) - 25
A. 423 B. 46 C. 1179 D. 129
Mathematics
Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.cot 
A. 
B. 1
C. 
D. -1
Mathematics