Find a formula for the nth term of the sequence.8, -8, 8, -8, 8 (8's with alternating signs)
A. an = 8(-1)2n-1
B. an = 8(-1)2n+1
C. an = 8(-1)n
D. an = 8(-1)n+1
Answer: D
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The money I pay for music is a linear function of the number of songs I download. If I download 7 songs, then I pay $11.98. If I download 13 songs, then I pay $18.82. How much do I pay if I download 23 songs? ? ?
A. $27.16 B. $30.64 C. $26.22 D. $30.22
Perform the indicated operation.5 gal 3 qt × 2
A. 12 gal B. 11 gal 2 qt C. 10 gal 2 qt D. 11 gal 3 qt
Fill in the blank with one of the words or phrases listed below.
A(n) 
is a natural number greater than 1 whose only factors are 1 and itself.
A. numerator B. composite number C. prime number D. mixed number
Solve the system of equations.
x + 
y - 
z = -3- 
x - 
y - 
z = 4
style="vertical-align: -17.0px;" />x + 
y + 
z = 17
A. 
B. 
C. 
D. 