Factor.4x2 - 4x - 24
A. (4x + 8)(x - 3)
B. (4x + 2)(x - 12)
C. 4(x - 2)(x + 3)
D. 4(x + 2)(x - 3)
Answer: D
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Determine the principal value without using a calculator.
2
A. -8 B. -8 or 8 C. 8 D. Not real number
Find the mean.Jill kept track of the number of hours she spent exercising each week. The results for four months are listed below. Find the mean number of hours Jill spent exercising per week. Round your answer to one decimal place if necessary. 6.7 7.4 7.5 8.6 7.3 6.7 8.7 7.5 8.2 6.7 8.6 8.3 8.8 7.4 7.4 8.2 7.3 8.7
A. 8.2 B. 7.8 C. 7.4 D. 8.0
Solve the problem.At Allied Electronics, production has begun on the X-15 Computer Chip. The total cost function is given by 
and the total profit function is given by 
, where x represents the number of boxes of computer chips produced. The total revenue function, R(x), is such that 
. Find R(x).
A. R(x) = 46x - 0.3x2 B. R(x) = 46x + 0.3x2 C. R(x) = 48x - 0.3x2 D. R(x) = 45x - 0.6x2
Combine like terms.4x2 - 4xy + 8y2 - 8x2 - xy
A. 4x2 - 5xy B. -4x2 - 3xy + 8y2 C. -4x2 - 5xy + 8y2 D. 4x2 - 5xy + 8y2