Simplify.(
+ 2)(
- 2)
A. 5 - 2
B. 1
C. 9
D. 3
Answer: B
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A boat travels upstream (against the current) between two points on a river 10 mi apart in 2.5 hours. The return trip downstream takes only 45 minutes. What is the boat's speed, and how fast does the current in the river flow?
(a) The speed of the boat is 4.5mi/h and the speed of the current flow is about 8.4 mi/h. (b) The speed of the boat is 8.7 mi/h and the speed of the current flow is about 4.7 mi/h. (c) The speed of the boat is 6.7 mi/h and the speed of the current flow is about 8.7 mi/h. (d) The speed of the boat is 5 mi/h and the speed of the current flow is about 4 mi/h. (e) The speed of the boat is 13.7 mi/h and the speed of the current flow is about 6.7 mi/h.
Give the equation of the vertical asymptote(s) of the rational function.g(x) = 
A. x = 1 B. x = 1, x = -6 C. x = -1, x = 6 D. x = -1
Use a graphing calculator to plot the data and find the quadratic function of best fit.The following table shows the median number of hours of leisure time that Americans had each week in various years.
Use x = 0 to represent the year 1973. Using a graphing utility, determine the quadratic regression equation for the data given. What year corresponds to the time when Americans had the least time to spend on leisure?
What will be an ideal response?
Subtract the polynomials. Express your answer in standard form.(8x6 - 20x4 + 10) - (4x6 - 12x4 + 8)
A. -2x10 B. 4x6 - 8x4 + 2 C. 4x6 - 8x4 + 18 D. 4x6 - 16x4 + 18