Factor.9x2 + 12x + 4
A. 9x2 + 12x + 4
B. (9x + 2)(x + 2)
C. (3x + 2)(3x + 2)
D. (3x - 2)(3x - 2)
Answer: C
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Solve the problem.A computer is purchased for $4400. Its value each year is about 78% of the value the preceding year. Its value, in dollars, after t years is given by the exponential function V(t) = 4400(0.78)t. Find the value of the computer after 6 years.
A. $772.89 B. $990.88 C. $602.85 D. $20,592.00
Solve the rational equation.
= 1 + 
A. -6, 8 B. 6, -8 C. -5, 8 D. empty set
Simplify. Assume that all variables are nonnegative.
A. 144ab4 B. 12ab6 C. 12ab4 D. 144ab6
Solve the problem.A person with no more than $7000 to invest plans to place the money in two investments, telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 3 times the pharmaceuticals investment. Write a system of inequalities to describe the situation. Let 
to be invested in telecommunications and 
to be invested in pharmaceuticals.
A. x + y = 7000 x ? 3y x ? 0 y ? 0 B. x + y = 7000 y ? 3x x ? 0 y ? 0 C. x + y ? 7000 x ? 3y x ? 0 y ? 0 D. x + y ? 7000 3x ? y x ? 0 y ? 0