Laurence started with 30 pieces of candy and gave away x pieces. Beatriz started with 70 pieces of candy and gave away five time
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Hi there!
Evaluating f(x) at x = 9 means we must use the piecewise function where x = 9 is included.
f(x) = 12 includes 9 because a "≤" is inclusive of the interval. Thus:
f(9) = 12