Solve the equation. 
= 5.1
A. -5.1
B. 5.1
C. 2601
D. 5.1, -5.1
Answer: D
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Solve the problem.The period of vibration P for a pendulum varies directly as the square root of the length L. If the period of vibration is 3 sec when the length is 36 inches, what is the period when 
(Round to the nearest hundredth.)
A. 0.75 sec B. 3.25 sec C. 3.75 sec D. 4.00 sec
Write the sentences as a system of inequalities in two variables. Then graph the system.The sum of the x-variable and the y-variable is at least 7. The x-variable added to the product of 2 and the y-variable does not exceed -2.
A. x + y ? 7
x + 2y ? -2
B. x + y ? 7
2x + y ? -2
C. x + y ? 7
2x + y ? -2
D. x + y ? 7
x + 2y ? -2
Is the function graphed below one-to-one?
A. Yes B. No
Name the conic.
A. hyperbola B. ellipse C. parabola D. circle