If x/y = 3/z, then 4x^2 =
Choose the correct answer:	A) y/z	B) xy	C) y²/z²	D) 36y²/z²	E) 15y²/z²
This question is most easily solved by isolating y in the equation and substituting into the expression 4x²:   x/y = 3/z   x = 3y/z   If we substitute 3y/z into the expression for x, we get:   4(3y/z)² = 4(9y²/z²) = 36y²/z².   The correct answer is choice (36y²/z²).
<result>D</result>
If x/y = 3/z, then 4x^2 =