Multiply.(x + 
)(x - 
)
A. x2 + 16x - 7
B. x2 - 16x - 7
C. x2 - 
D. x2 - 16
Answer: C
Mathematics
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, F(x) = 
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Solve the problem.Find the mass of the solid in the first octant between the spheres 
and 
if the density at any point is inversely proportional to its distance from the origin.
A. 9k? B. 12k? C. 72k? D. 6k?
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Use the discriminant to determine the number of real solutions.4y2 = -5y - 3
A. Two real solutions B. One real solution C. No real solutions
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Solve the equation by making an appropriate substitution.2x - 6
- 80 = 0
A. 
B. 
C. {8}
D. {64}
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