Factor when possible.81 - x2
A. (9 - x)2
B. (9 + x)2
C. (9 - x)(9 + x)
D. prime
Answer: C
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Solve the problem.The owners of a candy store want to sell, for $6 per pound, a mixture of 
raisins, which usually sells for $3 per pound, and 
macadamia nuts, which usually sells for $8 per pound. They have a 
barrel of the raisins. How many pounds of the nuts should they mix with the barrel of raisins so that they hit their target value of $6 per pound for the mixture?
A. 60 pounds B. 56 pounds C. 64 pounds D. 52 pounds
Solve the problem.The graph shows the average annual cost (in dollars) of tuition and fees at a certain 2-year college for selected years, where year 1 represents 1992, year 3 represents 1994, and so on. The equation of the line of "best fit" is 
, where f(x) is the cost in the year x. Predict the average annual cost in 2004 to the nearest dollar.
A. $1409 B. $1438 C. $1467 D. $1496
Simplify the expression using the order of operations.2(-6) - (-9)
A. -3 B. 6 C. 3 D. 21
The sequence is defined recursively. Write the first four terms.a1 = 4 and an = 4an-1 + 3 for n ? 2
A. 4, 16, 64, 256 B. 4, 19, 79, 319 C. 4, 19, 67, 259 D. 4, 13, 49, 193