Use a grapher to find the vertex or x-intercepts, as indicated, of the quadratic function.Find the vertex of the function f(x) = -0.2x2 + 0.7x - 6.9.
A. (1.75, -7.5125)
B. (1.75, -6.2875)
C. (1.75, -6.9)
D. (-1.75, 6.2875)
Answer: B
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Use the graph of a quadratic function to find the solution set of the equation or inequality. For a solution set that involves an interval, use interval notation.x2 + 8x + 15 = 0
A. x = -5, -3 B. (-?, -5) ? (-3, ?) C. x = 3, 5 D. x = -1, -3
Sales of computers are subject to seasonal fluctuations. Computer City's sales of computers in 1995 and 1996 can be approximated by the function
?
?
where ?t is time in quarters (
represents the end of the first quarter of 1995) and 
is computer sales (quarterly revenue) in billions of dollars. Estimate Computer City's maximum and minimum quarterly revenue from computer sales.
?
Maximum sales __________ billions of dollars
?
Minimum sales __________ billions of dollars
What will be an ideal response?
Solve the inequality and graph the solution on the real number line.
?
?
A. 
B.
C.
D.
E.
Find the GCF.88x2, 44x6
A. 66x2 B. 22x4 C. 44x2 D. 88x2