Find the series' radius of convergence.
A. 1
B. ?, for all x
C. 10
D. 5
Answer: D
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Use the figure showing isotherms for the United States to answer the question. 
If you were in Los Angeles and wanted to drive to warmer weather as quickly as possible, in which direction would you drive?
A. South B. Southeast C. Southwest D. Northeast
If a and b are rational numbers, with a ? 0 and b ? 0, and if m and n are integers, determine if the following is true or false. Justify your answer.(a - b)m = am - bm
A. True; (2 - 1)1 = 21 - 11 B. False; (2 - 1)2 ? 22 - 12
A plane in three dimensional space can be written as ax + by + cz = d. We can find the possible intersections of planes in this form by writing them as systems of linear equations and using reduction to solve them. If d = 0 in each equation, then we have a homogeneous system with either a unique solution or infinitely many solutions.Determine whether the intersection of the planes: 
has a unique solution or infinitely many solutions; then solve the system.
What will be an ideal response?
Solve the system of equations by the elimination method.-6x + 5y = 362x + 2y = -12
A. no solution B. (-6, 0) C. (-6, 1) D. (-7, 1)