document.write( "Question 292495: For all matrices X3*3, Y2*3, Z3*3 and scalars q, which statement is always true?\r
\n" ); document.write( "\n" ); document.write( "a) X + 2X + Z
\n" ); document.write( "b) q( XZ ) = ( qX )Z
\n" ); document.write( "c) q( YZ ) = ( ZY )q
\n" ); document.write( "d) ( XY ) Z = Z ( YX )
\n" ); document.write( "

Algebra.Com's Answer #211280 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
a) is not a statement, it's an expression.
\n" ); document.write( "b) is true
\n" ); document.write( "q[XZ]=[qX][Z]=[X][qZ]
\n" ); document.write( "
\n" ); document.write( "
\n" );