Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.an = an-1 - 10, a1 = 36
A. an = 26n + 36, a20 = 556
B. an = -10n + 46, a20 = -154
C. an = 36n + 46, a20 = 766
D. an = -10n + 26, a20 = -174
Answer: B
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Solve the formula for the specified variable.I = 
for n
A. n = 
B. n = 
C. n = 
D. n = IR(Ir - E)
Use the information below to determine the indicated set. U = {x | x ? N and x ? 15} A = {x | x ? N and 5 < x < 10} B = {x | x ? N and x is even and x < 14} C = {x | x ? N and 8 ? x ? 13} (B' ? C)' ? A
A. {6, 7, 8, 9, 11, 12, 13} B. {2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14} C. {6, 7, 8, 9, 11, 13} D. {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15}
Simplify, then write in descending order.5m3 + 5m2 + 15m - 16m2 + 15m - 3m3
A. 2m3 - 11m2 + 30m B. 2m3 -11m2 - 30m C. 2m3 + 11m2 - 30m D. 2m3 + 11m2 + 30m
Provide an appropriate response. A catalog company is considering the purchase of an 800 phone number. Without the 800 number, calls cost $0.22 per minute, and with the 800 number calls will cost $0.13 per minute plus a $55.00 flat rate. Write a symbolic statement that could determine the minutes of calls that would make the $0.22 per minute charge equal to a $0.13 per minute charge including the $55.00 flat rate.
A. 0.22 = 0.13 + 55.00x B. 0.22x = 0.13 + 55.00x C. 0.22x = 0.13x + 55.00 D. 0.22x + 55 = 0.13x