Use the bar graph to answer the question.The bar graph illustrates the numbers of certain grades earned in Mathematics 100. How many grades of D were earned?
A. 10
B. 3
C. 8
D. 5
Answer: B
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Solve the problem.The cost C of producing t units is given by C(t) = 3t2 + 8t, and the revenue R generated from selling t units is given by 
For what values of t will there be a profit?
A. There will be a profit when more than 9 units are sold. B. There will be a profit when more than 7 units are sold. C. There will be a profit when more than 8 units are sold D. There will be a profit when 0 units are sold.
Find the value of c for which the expression is a perfect square trinomial. Then factor the perfect square trinomial.x2 - 2x + c
A. c = 4; x2 - 2x + 4 = (x - 2) 2 B. c = -1; x2 - 2x - 1 = (x - 1) 2 C. c = -4; x2 - 2x - 4 = (x - 2) 2 D. c = 1; x2 - 2x + 1 = (x - 1) 2
Add. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Solve the equation by completing the square.x2 - 8x - 7 = 0
A. {8 - 
, 8 + 
}
B. {4 - 
, 4 + 
}
C. {-4 - 
, -4 + 
}
D. {4 - 
, 4 + 
}