Felicity babysat 2 hours each night for 10 nights. She earned a total of $180 babysitting. Felicity wants to calculate her hourl
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Recall the polynomial remainder theorem: if is a factor of some polynomial
, then the remainder upon dividing
by
is
.
Let and
. The remainder left from dividing
by
is
If we subtract 5 from both sides, we'd get a "remainder" of 0, which suggests that we have to add -5 to to make
a factor.