Evaluate the polynomial for the given values of the variables.Evaluate -2x2 + xy - y2 for x = -1 and y = 5.
A. 22
B. -22
C. -32
D. 18
Answer: C
Mathematics
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Find the limit.
sec 
A. 0
B. - 
C. 1
D. -1
Mathematics
Solve the system.
A. (5, 1), 
B. (-5, -1), 
C. (5, -1), 
D. (5, 1), 
Mathematics
Find the values of x for which the expression is a real number.
A. (-?, 23) B. (-?, 23] C. [23, ?) D. (23, ?)
Mathematics
Factor the trinomial by grouping, or state that the trinomial is prime.7x2 + 51x + 54
A. (7x + 9)(7x + 6) B. (7x + 6)(x + 9) C. (7x + 9)(x + 6) D. prime
Mathematics