Use properties of real numbers to calculate the expression mentally.
? 
? 
? 
? 
A. 1
B. 
C. 
D. 4
Answer: C
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Solve the problem.A spring with a spring constant k of 18 pounds per foot is loaded with a 16-pound weight and allowed to reach equilibrium. It is then displaced 2 feet downward and released. If the weight experiences a retarding force in pounds equal to 10 times the velocity, find the equation of motion.
A. y ? e-10t(-0.250e8.000t + 2.250e-8.000t) B. y ? e-10t(2.250e8.000t + -0.250e-8.000t) C. y ? e-20t(-0.500e8.000t + 4.500e-8.000t) D. y ? e-10t(4.500e8.000t + -0.500e-8.000t)
Provide an appropriate response.Solve the following system of equations by first solving Equation (1) for x and then substituting for x in Equation (2). Then solve the system again by first solving Equation (1) for 2y and substituting for 2y in Equation (2). Which procedure do you prefer? Explain why you answered as you did.?x + 2y = 6(1)3x + 2y = 4(2)
What will be an ideal response?
Simplify.- 
A. does not exist as a real number
B. - 
C. - 
D. 
Solve the equation by completing the square.x2 + 16x + 43 = 0
A. {-8 - 
, -8 + 
}
B. {8 - 
, 8 + 
}
C. {8 + 
}
D. {-16 + 
}