Find the focus and directrix of the parabola with the given equation.y2 = -7x
A. Focus: 
, directrix: x = - 
B. Focus: 
, directrix: y = 
C. Focus: (-7, 0), directrix: x = 7
D. Focus: 
, directrix: x = 
Answer: D
Mathematics
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Provide an appropriate response.Perform the indicated operation, leaving the answer in lowest terms: 
- 
2 =
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation.-79 + (-42)
A. 121 B. -37 C. -121 D. 37
Mathematics
Use the graph of the polynomial function f(x) to solve f(x) = 0.
A. -2, 
, 3
B. -3, - 
, 2
C. -3, 2
D. -2, 3
Mathematics
Using the factoring method, solve for the roots of the quadratic equation.45x2 = -45x
A. x = - 1 B. x = - 1, x = 45 C. x = - 1, x = 0 D. x = 0
Mathematics