Solve for x.
?
?
A. 8
B. 2
C. -2
D. -6
E. 6
Answer: B
Mathematics
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Find the focus and the directrix of the parabola.y = - 
x2 - 
x - 
A. (-5, -3); y = -5
B. (-5, 0); y = 2
C. (-5, 2); y = 0
D. 
; y = 
Mathematics
Perform the indicated operations.
A. 1 B. 3 C. -3 D. -16
Mathematics
Graph the function.y = -sec x
A. 
B. 
C. 
D. 
Mathematics
Write the matrix equation as a system of linear equations without matrices.
= 
A.
| 2x + 5y + 7z | = | -2 |
| 9x + 8z | = | 4 |
| 4x + 9y | = | 2 |
B.
| 2x + 5y + 7z | = | -2 |
| 9x + 8z | = | 4 |
| 4x + 9z | = | 2 |
C.
| 2x - 5y + 7z | = | -2 |
| 9x + 8z | = | -4 |
| 4x + 9y | = | -2 |
D.
| 2x + 5y + 7z | = | -2 |
| 9x + 8y | = | 4 |
| 4x + 9z | = | 2 |
Mathematics