Find the domain of the rational function.f(x) = 
A. domain of f: (-?, -9) ? (-9, 9) ? (9, ?)
B. domain of f: (-?, 0) ? (0, ?)
C. domain of f: (-?, -9) ? (-9, 2) ? (2, ?)
D. domain of f: (-?, -2) ? (-2, 9) ? (9, ?)
Answer: C
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Graph the function.G(x) = 
A. 
B. 
C. 
D. 
Simplify.(4x2 + 5x + 20) + (-6x2 - 8x - 9)
A. -2x2 + 3x + 11 B. -2x2 - 3x + 11 C. -2x2 - 3x + 29 D. -2x2 + 11x + 29
Use substitution to determine whether the given x-value is a solution of the equation.cos 2x = - 
, x = 
A. Yes B. No
Solve the problem.The amount of simple interest earned on an investment over a fixed amount of time is jointly proportional to the principle invested and the interest rate. A principle investment of $4000.00 with an interest rate of 2% earned $320.00 in simple interest. Find the amount of simple interest earned if the principle is $3000.00 and the interest rate is 4%.
A. $240.00 B. $480.00 C. $640.00 D. $48,000.00