Find n for the given value of an in the arithmetic sequence.an = -480; 800, 780, 760, . . .
A. n = 64
B. n = 61
C. n = 65
D. n = 62
Answer: C
Mathematics
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Subtract.
A. 9440 B. 440 C. 9430 D. 9390
Mathematics
Solve the system of nonlinear equations using the method of elimination.
A. (-1, 0), (-1, -8), (8, 1), (8, 9) B. (-1, 0), (-1, 8), (-8, -1), (-8, 9) C. (1, 0), (1, 8), (4, -1), (4, 9) D. (-1, 0), (-1, 8), (8, -1), (8, 9)
Mathematics
Find the first term and the common difference.
, 
, 
, 
, . . .
A. a1 = 
, d = 
B. a1 = 
, d = 
C. a1 = 
, d = 
D. a1 = 
, d = 
Mathematics
The boat swim y miles downstream in 5 hours. The speed of the boat in still water is 24 mph. Write the a linear equation that represent how distance depends from the speed of stream x.
A. y = 5x + 120 B. y = 5x + 24 C. y = 120x + 5 D. y = 24x + 120
Mathematics