Simplify the expression. Write the answer using positive exponents.(xy)-8
A. 
B. -x8y8
C. -8xy
D. 
Answer: D
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Solve the problem.A spring with a spring constant k of 8 pounds per foot is loaded with a 16-pound weight and allowed to reach equilibrium. It is then displaced 4 feet downward and released. If the weight experiences a retarding force in pounds equal to 0.15 times the velocity, find the equation of motion.
A. y ? e-0.15t(4 cos 4t + 0.15 sin 4t) B. y ? e-0.075t(4 cos 4t + 1.2 sin 4t) C. y ? 4 sin 4t + 1.2 cos 4t D. y ? e-0.15t(4 sin 4t + 0.15 cos 4t)
Translate the problem situation to a system of equations. Do not solve.The difference between two numbers is 11. Three times the smaller number plus the larger number is 67. What are the numbers?
A. x - y = 11; x + 3z = 67 B. x - y = 11; 3x + y = 67 C. x - y = 11; x + 3y = 67 D. x + y = 11; x + 3y = 67
Solve the equation.(-5p + 6)2 = -3(-5p + 6) + 10
A. - 
, - 1
B. 2
, 
C. -5, 2
D. - 2
, - 
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 8x - y - 3z = 28 8x + 4y - 5z = 60-7x - 9y + z = -110
A. (6, 8, 4) B. (-6, 8, 12) C. (6, 4, 8) D. No solution