Find a recursive rule for the nth term of the sequence.8, 12, 16, 20, ...
A. an= an-1 - 4
B. an= an-1 + 5
C. an= an-1 + 8
D. an= an-1 + 4
Answer: D
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Find the second derivative.y = 3x3 - 6x2 + 5
A. 18x - 12 B. 12x - 12 C. 12x - 18 D. 12x - 12
Solve the equation. Express radicals in simplest form.-2k2 - 1 = -19
A. ±6 B. -9.5 C. 3 D. ±3
Solve.An express and local train leave GraysLake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
A. Express's rate = 60 mph and local's rate = 30 mph. B. Express's rate = 50 mph and local's rate = 25 mph. C. Express's rate = 25 mph and local's rate = 12.5 mph. D. Cannot be determined with information given.
Solve the equation after making an appropriate substitution.x6 - 63x3 - 64 = 0
A. {-4, 1} B. {4} C. {4, -1} D. {64}