document.write( "Question 2169: which of the following is (are) like terms?\r \n" );
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document.write( "1.34x and - 18x \n" );
document.write( "2. 2x and 2xy \n" );
document.write( "3. x3 and 3x\r \n" );
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document.write( "A. 1 only \n" );
document.write( "B. 2 only \n" );
document.write( "C. 1 and 3 only \n" );
document.write( "D. 2 and 3 only \n" );
document.write( "E. 1, 2, and 3 \n" );
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