1.	Evaluate the expression 5n4m-2 if m = 6 and n = 3.
		A.	-20	B.	-5
		C.		D.
		Hint
	2.	Write the expression 5-4 using a positive exponent.
		A.		B.
		C.	54	D.	-54
		Hint
	3.	Write the expression m-7 using a positive exponent.
		A.		B.
		C.	m7	D.	-m7
		Hint
	4.	Evaluate x-4 if x = 3.
		A.	-81	B.
		C.		D.	81
		Hint
	5.	Evaluate y-5 if y = -2.
		A.		B.
		C.	-32	D.	32
		Hint