Factor.18m9 - 12m5 + 30m2
A. m2(18m7 - 12m3 + 30)
B. No common factor
C. 6m2(3m7 - 2m3 + 5)
D. 6(3m9 - 2m5 + 5m2)
Answer: C
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Determine whether the given ordered pair is a solution to the system.(-3, 1)
A. no B. yes
Simplify the expression.5(3x - 2) - 6(x - 3)
A. -15x + 8 B. 9x - 28 C. 9x + 8 D. 9x - 5
Factor by grouping.xy + y + 9x + 9
A. (x + 9)(y + 1) B. (x + 1)(y + 9) C. (9x + 9)(y + 1) D. (x + 1)(9y + 9)
Solve the problem.The time between major earthquakes in a particular region of the Mediterranean is a random variable with probability density function f(x) = 
e-x/1800 for x in [0, ?), where t is measured in days. Find the expected value and the standard deviation of this probability density function.
A. ? = 3600 days; ? = 2545.2 days B. ? = 1800 days; ? = 3600 days C. ? = 1800 days; ? = 2545.2 days D. ? = 1800 days; ? = 1800 days