Question 630075
 If w, x, y, and z are four nonzero numbers, then all of the following proportions are equivalent EXCEPT
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 Form the equivalent cross-product equations.

The cross product equation is

{{{(matrix(2,1,LEFT,NUMERATOR))}}}×{{{(matrix(2,1,RIGHT,DENOMINATOR))}}} = {{{(matrix(2,1,RIGHT,NUMERATOR))}}}×{{{(matrix(2,1,LEFT,DENOMINATOR))}}}

(A) {{{z/w=x/y}}} the cross product equation: zy = xw

(B) {{{w/x=y/z}}} the cross product equation: wz = yx

(C) {{{y/w=z/x}}} the cross product equation: yx = zw

(D) {{{x/z=w/y}}} the cross product equation: xy = wz

(E) {{{xy/wz=1/1}}} the cross product equation: xy = wz

The cross product equations are all equivalent except (A)

Edwin</pre>