Graph the polar equation.r = 2 - 1 cos ?
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Use the product rule to simplify the expression. Assume that the variables can be any real number.
A. 3xy2
B. 3
C. 81
y2
D. 3
y2
Mathematics
Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Mathematics
Solve the problem.How many two-digit counting numbers do not contain any of the digits 1, 3, or 9?
A. 81 numbers B. 49 numbers C. 72 numbers D. 42 numbers
Mathematics
Tell which set or sets the number belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
A. rational, real B. irrational, real C. real D. whole, real
Mathematics