Use identities to find the exact value of the function for the given value.sin ? = 
and ? is in quadrant II; Find tan ?.
A. -
B.
C. -
D. -
Answer: A
Mathematics
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Solve the problem.Determine k so that the line y = kx + 5 is parallel to the line 5x - 4y + 40 = 0.
A. 
B. 5
C. 
D. - 
Mathematics
Let f(x, y) = x2 - xy + y2 + 2y - 4. The point 
is a
A. absolute maximum B. not a relative extreme point C. relative minimum D. relative maximum
Mathematics
Simplify. Assume that all variables represent positive numbers.
A. (7x + 5)2 B. 7x + 5 C. (7x - 5)2 D. 7x - 5
Mathematics
Multiply.-9x2(x3 + 5x - 9)
A. -9x5 + 14x3 - 18x2 B. -9x5 - 14x3 + 18x2 C. -9x5 - 45x3 + 81x2 D. -9x5 + 45x3 - 81x2
Mathematics