Solve the inequality and graph the solution.x2 + 3x ? -2
A. [1, 2]
| 1? | 2 |
B. (-?, 1] or [2, ?)
| 1? | 2 |
C. [-2, -1]
| -2? | -1 |
D. (1, 2)
| 1? | 2 |
Answer: C
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Solve the linear inequality. Other than ?, use interval notation to express the solution set and graph the solution set on a number line.8x - 4 ? 7x - 8
A. (-?, -4]
B. [-4, ?)
C. (-?, -4)
D. (-12, ?)
Simplify. Assume that all variables represent non-negative real numbers.
A. 6xy
B. 6xy
C. 6xy
D. 3xy
Solve the problem.The concentration of a drug in the bloodstream, measured in milligrams per liter, can be modeled by the function, 
where t is the number of minutes after injection of the drug. When will the drug be at its highest concentration? Approximate your answer rounded to two decimal places.
A. t = 4 minutes after the injection is given B. t = 3.65 minutes after the injection is given C. t = 0.55 minutes after the injection is given D. at the time of injection
Evaluate the expression using the given value of the variables.-4x2 + 4y2 for x = -3, y = 2
A. -20 B. -52 C. -28 D. 28