Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = 3x5 - 3x4 + 9x3 - 9
A. 1 positive; 1 or 3 negative
B. 1 or 3 positive; 0 negative
C. 1 or 3 positive; 1 or 3 negative
D. 0, 2, or 4 positive; 0 negative
Answer: B
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Evaluate.91
A. 9 B. Not defined. C. 1 D. 0
Solve the system by the substitution method.
+ y2 = 9
A. {(0, 3), (
, 2)}
B. {(0, 3), (- 
, 2)}
C. {(- 
, 2), (0, -3), (
, 2)}
D. {(0, -3), (
, 2)}
Graph the solution set of the system of inequalities.x + 2y ? 2 x + y ? 0
A. 
B. 
C. 
D. 
Solve the problem.The year y when sales were s million dollars for a particular electronics company can be modeled by the radical equation y = 1.2
- 6, where y = 1 represents 2010, and so on. Describe the transformations needed to obtain the graph of this function from the graph of y = 
.
A. Shift 1.2 units to the right, stretch vertically by a factor of 4, and shift down by 6 units. B. Shift 4 units to the right, stretch vertically by a factor of 1.2, and shift down by 6 units. C. Shift 4 units down, stretch vertically by a factor of 1.2, and shift 6 units to the right. D. Shift 4 units to the left, stretch vertically by a factor of 1.2, and shift down by 6 units.