Graph the function.f(x) = 2x(x + 2)(x - 1)
A. 
B. 
C. 
D. 
Answer: D
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The concentration C, in milligrams per deciliter, of a certain drug in the bloodstream t hours after injection is given in the following table. t0123 C36.0030.2425.4021.34? A: Make a table of successive ratios to show that the concentration of the drug can be modeled by an exponential function. Round your answer to two decimal places.B: Find an exponential model for the data. Round your answer to two decimal places.C: Plot the graph of the data points along with the exponential model. Include up to 10 hours.D: According to the model, how long will it take for the drug concentration to decay to 14.00% of the initial amount? Round your answer to two decimal places.
What will be an ideal response?
Solve the system.2x + 2y + z = -85x - 2y - z = -274x + y + 3z = -24
A. {(-5, 2, -2)} B. {(-5, -2, 2)} C. ? D. {(-2, 2, -5)}
Show that the two ordered pairs are solutions to the given equation. Then use the graph of the two points to determine another solution. Answers may vary.y = 
x - 4; (2, -3), (0, -4)
What will be an ideal response?
Use the echelon method to solve the system of two equations in two unknowns. x + 5y = 2 2x + 6y = 4
A. (3, 2) B. (-2, -1) C. (2, 0) D. No solution