Chapter 6 Quadratic Equations By Factoring Worksheet With Answer Key - Mcgraw-Hill Page 8
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10ANSWERS
69.
69.
Break-even analysis. The manager of a bicycle shop knows that the cost of selling x
2
bicycles is C
20x
60 and the revenue from selling x bicycles is R
x
8x. Find
70.
the break-even value of x.
71.
72.
70.
Break-even analysis. A company that produces computer games has found that its
2
operating cost in dollars is C
40x
150 and its revenue in dollars is R
65x
x
.
For what value(s) of x will the company break even?
Use your calculator to graph f(x).
2
f(x)
3x
24x
36. Note the x values at which the graph crosses the x axis.
71.
Compare your answer to the solution for exercise 47.
2
2
f(x)
2x
6x
56. Note the x values at which the graph crosses the x axis.
72.
Compare your answer to the solution for exercise 48.
20
20
40
60
470
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