Perform the indicated operation. Write the result in standard form.(-4 + 6i) - 5
A. 1 - 6i
B. 1 + 6i
C. -9 + 6i
D. 9 - 6i
Answer: C
Mathematics
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Find the vertex, focus, and directrix of the parabola. Graph the equation.x2 = 16y
A. vertex: (0, 0)
focus: (0, 4)
directrix: y = -4
B. vertex: (0, 0)
focus: (0, -4)
directrix: y = 4
C. vertex: (0, 0)
focus: (-4, 0)
directrix: x = 4
D. vertex: (0, 0)
focus: (4, 0)
directrix: x = -4
Mathematics
Evaluate the algebraic expression for the given values of the variables.2x2 + 10y for x = 7 and y = 8
A. 944 B. 276 C. 198 D. 178
Mathematics
The rectangular coordinates of a point are given. Find polar coordinates for the point.(0, -7)
A. (7, 0)
B. 
C. 
D. (7, ?)
Mathematics
Determine whether the following is a difference of squares.9x2- 15y2
A. Yes B. No
Mathematics