Factor the four-term polynomial by grouping.x3 + 7x + x2 + 7
A. (7x + 1)(x + 1)
B. (x2 + 7)(x + 1)
C. (x2 + 1)(7x + 1)
D. (x2 + 1)(x + 7)
Answer: B
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Graph the set of real numbers on a number line.{x|x ? 0}
A. 
B. 
C. 
D. 
Find the quadratic function y = f(x) that has the given vertex and whose graph passes through the given point.vertex (-3, -7); passing through (6, -1)
A. y = 
(x + 3)2 + 7
B. y = 
(x + 3)2 - 7
C. y = 
(x - 3)2 - 7
D. y = 
(x - 3)2 + 7
Multiply and simplify th result. Remember to divide out common factors before performing any multiplication.
? 
? 
A. 
B. 
C. 
D. 
Solve the problem.The cost C, in dollars, for a certain manufacturer to produce graphing calculators can be modeled by the function 
where x is the number of calculators produced. Find 
and interpret your results.
A. 118,250; It costs $118,250 to produce 2200 calculators. B. 110,900; It costs $110,900 to produce 2200 calculators. C. 114,400; It costs $114,400 to produce 2200 calculators. D. 117,900; It costs $117,900 to produce 2200 calculators.