5. Two cars leave Oakland at the same time and travel south on 1-880. One travels at a
constant rate of 60 mph. The other travels at a constant rate of 64 mph. In how many
hours will the distance between them be 24 mi?
6. An airplane, flying at a constant airspeed, takes as long to travel 450 mi with the wind as it does
to travel 375 mi against the wind. If the wind is blowing at 15 mph, what is the rate of the plane?
7. The length of a rectangular city park is 6 km less than twice its width. Its area is 56 km$^2$.
What are the dimensions of the park?
8. A lot has a shape of a right triangle with one leg 2 m longer than the other. The
hypotenuse is 2 m less than twice the length of the shorter leg. Find the length of the
shorter leg. (Draw the triangle, assign variable, use the Pythagorean theorem to write the
equation, and solve it.)
9. Solve for $x$ and graph your results on number lines.
a) $x + 1 < 7$ and $x \ge -2$
b) $x - 1 \ge 5$ or $x - 1 < 2.5$
c) $2x - 7 \ge -1$ and $3x - 5 \le 4$
d) $4x + 5 < 1$ or $2x - 1 > -9$
