Use a graphing calculator to sketch the graph of the quadratic equation, and then state the domain and range.

a. D: all real numbers

R:

c. D: all real numbers

R:

b. D: all real numbers

R: all real numbers

d. D: all real numbers

R:

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Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)