document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163366>Question 1163366</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A is a 5 3 matrix, B is an r  s matrix and C is a 4 5 matrix. If ATBC is dened, then<BR>\n" );
document.write( "the size of B is </SPAN>\n" );
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document.write( "I will assume \"ATBC\" is (A transpose)*(B)*(C).<br><BR>\n" );
document.write( "A is 5x3, so A transpose is 3x5.<br><BR>\n" );
document.write( "So in the multiplication (A transpose)*(B)*(C), the dimensions of the matrices are<br><BR>\n" );
document.write( "{3x5) * (rxs) * (4x5)<br><BR>\n" );
document.write( "For the multiplication to be possible, r must be 5 and s must be 4.<br><BR>\n" );
document.write( "ANSWER: B is a 5x4 matrix.<br><BR>\n" );
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