Identify the variables, constants, terms and number of terms in each of the following expressions:
 
(I) 9+x 
 
(II) 17+9y
 
(III) 8x+25y+9
 
(IV) 12+17z+8y
 
S.NoExpressionsVariablesConstantTermsNumber of terms
 (I) 9+x   ,
 (II) 17+9y   ,
 (III) 8x+25y+9 ,   , ,
 (IV) 12+17z+8y ,   , ,