Solve the equation.
= x + 6
A. {-7}
B. {7}
C. {-8}
D. {8}
Answer: D
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Solve the problem.The number of dislocated electric impulses per cubic inch in a transformer increases when lightning strikes according to 
where x is the time in milliseconds of the lightning strike. Find the number of dislocated impulses at x = 0 and x = 3.
A. 8800, 2,252,800 B. 8800, 105,600 C. 8800, 563,200 D. 35,200, 563,200
Find the vertex, focus, and directrix of the parabola. Graph the parabola.x2 = -12y
A. vertex: (0, 0)
focus: (-3, 0)
directrix: x = 3
B. vertex: (0, 0)
focus: (3, 0)
directrix: x = -3
C. vertex: (0, 0)
focus: (0, 3)
directrix: y = -3
D. vertex: (0, 0)
focus: (0, -3)
directrix: y = 3
Factor completely.(m + n)b2 + (m + n)b + 7(m + n)
A. (m + n)(b2 + b + 7) B. b(m + n)(b + 8) C. (m + n)(b2 - b + 7) D. (m + n)(b + 7)(b - 7)
Multiply. Simplify by combining like terms.
A. x2 + 
y2
B. x2 - 
xy + 
y2
C. x2 - 
xy - 
y2
D. x2 - 
xy + 
y2