Simplify. Write your answer in the form a + bi, where a and b are real numbers.(-4 - 6i) - (7 - i)
A. -11 - 6i
B. -11 - 5i
C. -11 + 5i
D. 11 + 5i
Answer: B
Mathematics
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Choose the polar equation that matches the graph.
A. r = sec(2?) B. r = csc(2?) C. r = cos(2?)/? D. r = cos(?/2)
Mathematics
Solve the problem.A lumber yard has fixed costs of $5388.00 per day and variable costs of $0.54 per board-foot produced. Lumber sells for $2.54 per board-foot. How many board-feet must be produced and sold daily to break even?
A. 1749 board-feet B. 9977 board-feet C. 1796 board-feet D. 2694 board-feet
Mathematics
Indicate whether the graph of the equation is a circle, an ellipse, a hyperbola, or a parabola. Then graph the conic section.x = -y2 + 4y
A. ellipse
B. hyperbola
C. circle
D. parabola
Mathematics
Use = or ? for ? to write a true sentence.
? 
A. = B. ?
Mathematics