Find the vertex, focus, and directrix of the parabola. Graph the equation.y2 + 12y = 8x + 4
A. vertex: (-5, -6)
focus: (-7, -6)
directrix: x = -3
B. vertex: (-5, -6)
focus: (-5, -4)
directrix: y = -8
C. vertex: (-5, -6)
focus: (-5, -8)
directrix: y = -4
D. vertex: (-5, -6)
focus: (-3, -6)
directrix: x = -7
Answer: D
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The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the figure to answer the question. v (ft/sec)
What is the body's speed when t = 2 sec?
A. 2 ft/sec B. 3 ft/sec C. 0 ft/sec D. -2 ft/sec
Graph the ellipse. Label the foci and the endpoints of each axis.
+ 
= 1
A. F(±2
, 0); V(0, ±4); U(±2, 0)
B. F(±
, 0); V(±3, 0); U(0, ±2)
C. F(±
, 0); V(±2, 0); no endpoints
D. F(0, ±
); V(0, ±3); U(±2, 0)
Decide whether the statement is compound.Today is not Sunday.
A. Compound B. Not compound
Solve the equation using the quadratic formula. Simplify irrational solutions, if possible.x2 - 8x = 15
A. {4 ± 
}
B. {8 ± 
}
C. {4 ± 
}
D. {-4 ± 
}