Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation.y = -2x2 + 4x + 7
A. (1, 7)
B. (1, 5)
C. (-1, 9)
D. (1, 9)
Answer: D
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Provide an appropriate response.A ball rebounds 
of its previous height after each bounce. If the ball is dropped from a height of 27 feet, how far has it traveled in the air when it hits the ground for the twentieth time?
Fill in the blank(s) with the appropriate word(s).
Solve.You make a deposit of $85 into your checking account and you write a check for $39. What is the overall effect of these two actions?
A. $46 B. $124 C. -$124 D. -$46
Find a formula for the inverse of the function described below.A size 60 dress in Country C is size 18 in Country D. A function that converts dress sizes in Country C to those in Country D is 
A. f-1(x) = 2x + 12 B. f-1(x) = 2(x - 12) C. f-1(x) = 2(x + 12) D. f-1(x) = x + 12
Solve the equation.0.15(40) + 0.70x = 0.50(40 + x)
A. 35 B. 60 C. 70 D. 80