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OpenStudy (anonymous):
If f(x) = 2x + 8, find f(9).
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OpenStudy (anonymous):
f(9) = 2(9) + 8
OpenStudy (cwrw238):
just replace x by 9 and calculate
OpenStudy (anonymous):
19
OpenStudy (anonymous):
18 + 8 = 19??? how??
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