1.	Solve .
		A.	5	B.	10
		C.	3	D.
		Hint
	2.	Solve .
		A.	-7 or 2	B.	7
		C.	-7	D.	7 or 2
		Hint
	3.	Solve .
		A.	1 or 4	B.	0
		C.	-2	D.	4
		Hint
	4.	Solve .
		A.	-2 or	B.	5
		C.	-2 or 7	D.	-2
		Hint
	5.	The total resistance RT in a particular circuit is related to the other resistances in the circuit by the equation . Find R2 if RT = 2.4 ohms, R1 = 6 ohms, and R3 = 3 ohms.
		A.	3.6 ohm	B.	5.4 ohm
		C.	1 ohm	D.	4 ohm
		Hint