Simplify the expression. Write the result using positive exponents only.(-2x6y-7)(5x-1y)
A. 
B. -10x5y8
C. 
D. 
Answer: C
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Solve the problem.Suppose that the velocity of a falling body is v = 
(k a constant) at the instant the body has fallen s meters from its starting point. Find the body's acceleration as a function of s.
A. a = - 
B. a = - 
C. a = 
D. a = - 
Evaluate the radical expression if it is a real number. Use a calculator to approximate irrational numbers to the nearest hundredth. If the expression is not a real number, so state.
A. 
B. 
C. - 
D. not a real number
Solve the problem.To solve the rational inequality 
? 2, you can first write the inequality with 0 on one side and the other side expressed as a single fraction. What value or values of x make the numerator of that fraction equal to 0?
A. {2} B. {-2} C. {2, 3} D. {3}
Solve the problem.Points A and B are on opposite sides of a lake. Point C is 81.0 meters from A. The measure of angle BAC is 72°30', and the measure of angle ACB is determined to be 39°10'. Find the distance between points A and B (to the nearest meter).
A. 26 m B. 28 m C. 53 m D. 55 m