Find the focus and the equation of the directrix of the following parabola.x2 + 8x + 4y + 4 = 0
A. Focus (-4, 2), directrix y = 4
B. Focus (0, 2), directrix y = 2
C. Focus (2, 4), directrix y = 6
D. Focus (-4, 1), directrix y = 2
E. Focus (2, 0), directrix y = 4
Answer: A
Mathematics
You might also like to view...
Solve the problem.The length of a rectangle is 4 inches more than its width. If 2 inches are taken from the length and added to the width, the figure becomes a square with an area of 282.2 square inches. What are the dimensions of the original figure?
A. 16.8 in. by 16.8 in. B. 12.8 in. by 16.8 in. C. 14.8 in. by 18.8 in. D. 15.5 in. by 19.5 in.
Mathematics
Graph the function.y = -5x - 2
A. 
B. 
C. 
D. 
Mathematics
Solve.
= 6
A. 
B. 36
C. 
D. 6
Mathematics
Write the percent as a fraction or mixed number in lowest terms.
%
A. 
B. 
C. 
D. 
Mathematics