Find the vertex, focus, and directrix of the parabola with the given equation.(x + 4)2 = 16(y - 2)
A. vertex: (-4, 2)
focus: (-4, -2)
directrix: x = 6
B. vertex: (-4, 2)
focus: (-4, 6)
directrix: y = -2
C. vertex: (4, -2)
focus: (4, 2)
directrix: y = -6
D. vertex: (2, -4)
focus: (2, 0)
directrix: y = -8
Answer: B
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Write the first five terms of the geometric sequence with the first term a1 and common ratio r.a1 = 4, r = 3
A. 4, 7, 13, 31, 85 B. 1, 4, 12, 36, 108 C. 4, 12, 36, 108, 324 D. 12, 36, 108, 324, 972
Set up the percent proportion, and write "unknown" for the value that is not given. Recall that the percent proportion is 
= 
. Do not try to solve for any unknowns.43.8% of 70 is what?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Evaluate the expression for the given values of the variables, if possible.x ? y - 82, for x = 3, y = 3
A. 55 B. -120 C. -55 D. 120
Solve the equation.log7(4x + 3) = log7(4x + 7)
A. ?
B. {2}
C. 
D. {0}