Factor completely.2x3 + 2x2 - 24x
A. 2x(x + 3)(x - 4)
B. (2x2 + 6x)(x - 4)
C. 2x(x - 3)(x + 4)
D. Prime
Answer: C
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Express using positive exponents. Then, if possible, simplify.
-2
A. - 
B. 
C. 
D. 9x2
Solve.A rectangular sign is being designed so that the length of its base, in feet, is 4 feet less than 4 times the height, h. Express the area of the sign as a function of h.
A. A(h) = -4h2 + 2h B. A(h) = -4h + h2 C. A(h) = -4h + 4h2 D. A(h) = 4h - 2h2
Solve the problem.The cost for labor associated with fixing a washing machine is computed as follows: There is a fixed charge of $20 for the repairman to come to the house, to which a charge of $23 per hour is added. Find an equation that can be used to determine the labor cost, C(x), of a repair that takes x hours.
A. C(x) = 23 + 20x B. C(x) = 20 + 23x C. C(x) = 20 - 23x D. C(x) = ( 20 + 23) x
Solve, using the substitution method, and check.
A. (6, 1) B. (-3, 4) C. (3, 4) D. (2, 5) E. (8, 9)