1.	Express 7-3 using positive exponents.
		A.		B.
		C.	(-7)3	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.	Write as an expression using a negative exponent.
		A.		B.	-26
		C.	2-6	D.
		Hint
	5.	Evaluate x-4 if x = 3.
		A.		B.	81
		C.		D.	-81
		Hint