Simplify.
A. a + s
B. -a + s
C. -1
D. -a - s
Answer: D
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Provide an appropriate response.The table shows the number of pupils per teacher in selected counties in a certain state. 
Which counties have a figure that is at most 12.5?
A. Addison, Branson, Cumberland, Dixson, Kendall, Putnum B. Hendricks C. Addison, Branson, Cumberland, Kendall, Putnum D. Dixson, Hendricks
Solve the problem.A ball is thrown directly upward from the top of a building that is 128 feet high. The height of the ball after t seconds is given by the trinomial 
feet. Write this polynomial in factored form.
A. 16(t2 + 2t + 4) B. -16(t + 2)(t - 4) C. -16(t2 + 2t + 4) D. 16(t - 2)(t + 4)
Solve the inequality.3x2 + 14x < 5
A. (-5, ?)
B. (-?, -5) or 
C. 
D. 
Prove the following statement directly from the definitions of the terms. Do not use any other facts previously proved in class or in the text or in the exercises.
For all integers a, b, and c, if a | b and a | c, then a | (5b + 3c).