Chapter 7: Systems of Equations and Inequalities
1. Solve the system.
y = x - 4
y = 2x + 5
2. Solve the system.
x
2 + y 2 = 25
2x
+ y = 1
y
+ z = 1
3. Is it possible to construct a small aquarium with an open
top and two square ends that holds 2 ft 3 of water and requires 8 ft
2 of glass? If so, what are
the dimensions?
4. A man rows a boat 500 feet upstream against a constant
current in 10 minutes. He then rows 300
feet downstream (same current) in 5 minutes. Find the speed of current and the
equivalent rate at which he can row in still water.