Find each product. Write the result in the form a + bi.(2 + 9i)(9 + 9i)
A. -63 + 99i
B. 81i2 + 99i + 18
C. -63 - 99i
D. 99 + 63i
Answer: A
Mathematics
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Find a function r(t) that describes the curve where the surfaces intersect. x2 + y2 = 16; z = 2x + 3y
A. r(t) = 
B. r(t) = 
C. r(t) = 
D. r(t) = 
Mathematics
Provide an appropriate response.A markup based on cost is generally used by retailers.
A. True B. False
Mathematics
Solve the equation f(x) = 0 analytically and then use the graph of y = f(x) to solve the inequalities f(x) < 0 and 
f(x) = 3(4x) - 48
A. {2}; (-?, 2); [2, ?) B. {-2}; (-?, -2); [-2, ?) C. {2}; [2, ?); (-?, 2) D. {2}; (-?, 2]; (2, ?)
Mathematics
Decide if the given point satisfies the system of linear equations.
(-3, -3)
A. Yes B. No
Mathematics