Divide.(6 + 5i) ÷ (9 - 6i)
A. 
- 
i
B. 
+ 
i
C. 
+ 
i
D. 
- 
i
Answer: C
Mathematics
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Solve the problem.A rectangular board is 13 by 18 units. The foci of an ellipse are located to produce the largest area. A string is connected to the foci and pulled taut by a pencil in order to draw the ellipse. Find the length of the string.
A. 13 B. 36 C. 26 D. 18
Mathematics
Factor by grouping.20x6 - 25x3 - 16x3 + 20
A. (20x3 + 4)(x3 + 5) B. (5x6 - 4)(4x - 5) C. (5x3 + 4)(4x3 + 5) D. (5x3 - 4)(4x3 - 5)
Mathematics
Graph the system of inequalities.x + 2y ? 2x + y ? 0
A. 
B. 
C. 
D. 
Mathematics
Decide whether the graph represents a function.
A. Function B. Not a function
Mathematics