Two oak trees were bought and planted side-by-side. The first tree was initially 10
feet tall and grew one foot each week. The
second tree started at 3 feet tall and grew 3
feet every two weeks. The equations that
can model the height, y, in terms of the
number of weeks since the trees were
purchased, x are y = x + 10 and
3
y = -x + 3. After how many weeks will
2
the plants be the same height?
e 2