Ben bowled 143 and 216 in his first two games. What must he bowl in his third game to have an average of at least 170?
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It can be helpful to graph the system. The appropriate choice is ...
... (0, 2) and approximately (1.91, 0.09)
Such a system of equations has no algebraic solution. Some graphing calculators will identify the points of intersection of the graphs to full calculator precision. Others can help you iterate a solution, if you need better accuracy.
