1.	Solve .
		A.	320	B.	10
		C.	2.5	D.	40
		Hint
	2.	Solve .
		A.	30	B.	20
		C.	35	D.	25
		Hint
	3.	Is a proportion? Explain.
		A.	Yes, because 2 × 9 = 8 × 3.
		B.	No, because 2 + 3 = 8 + 9.
		C.	Yes, because 2 × 3 = 8 × 9.
		D.	No, because 2 × 9 8 × 3.
		Hint
	4.	Find k if = .
		A.	60.5	B.	4.5
		C.	0.5	D.	2
		Hint
	5.	Determine whether = form a proportion. Explain.
		A.	No, because 10.62 × 4 = 6 × 7.05.
		B.	Yes, because 10.62 × 4 6 × 7.05.
		C.	Yes, because 10.62 × 4 = 6 × 7.05.
		D.	No, because 10.62 × 4 6 × 7.05.
		Hint