1.	Solve .
		A.	no real solution	B.	2
		C.	0	D.	-1
		Hint
	2.	Solve .
		A.	-1, 3	B.	3
		C.	1, 3	D.	-1
		Hint
	3.	Solve.
		A.	{6, 7}	B.	{5, 8}
		C.	7 only	D.	8 only
		Hint
	4.	Suppose the formula represents the relationship between a plane's length L and the pounds P its wings can lift, where k is a constant of proportionality calculated for a plane. If a plane must be able to support 300,000 pounds and its wings are 180 feet, what is the value of k?
		A.	0.0006	B.	0.108
		C.	0.0245	D.	0.573
		Hint
	5.	Solve.
		A.	13	B.	–13
		C.	no solution	D.	19
		Hint