Solve the system graphically. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this. 2x + y = 8 4x + 2y = 16
A. No solution
B. (5, -2)
C. (0, 8)
D. {(x, y)| 2x + y = 8}
Answer: D
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Solve the problem.Find the mass of a thin triangular plate bounded by the coordinate axes and the line 
if 
.
A. 144 B. 288 C. 72 D. 36
Use a calculator to perform the operation. Express your answer in scientific notation.0.0000725(0.00473)(2,450,000,000)
A. 8.40 × 10-14 B. 8.40 C. 8.40 × 102 D. 8.40 × 107
Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of hydrogen chloride dissolved in a solution, measured in parts per million (ppm), is related to the elapsed time measured from the beginning of the step. Use the following table as a representation of this relationship. What does the ordered pair (12, 28.4) mean in the context of this situation?
A. (12, 28.4) indicates that 12 ppm of hydrogen chloride was dissolved after 28.4 minutes elapsed. B. (12, 28.4) indicates that 28.4 ppm of hydrogen chloride was dissolved after 12 seconds elapsed. C. (12, 28.4) indicates that 28.4 ppm of hydrogen chloride was dissolved after 20 minutes elapsed. D. (12, 28.4) indicates that 28.4 ppm of hydrogen chloride was dissolved after 12 minutes elapsed.
Add or subtract.(-5mn + 3mn2 - 3m2n2) + 
A. 3m2n2 + 5m2n + 3mn2 - 11mn B. 1mn + 3mn2 + 5m2n + 3m2n2 C. 0m2n2 D. -11mn + 8m2n + 3m2n2