Equivalent expressions I
This task is about simplifying algebraic expressions.
a) 
The expression 3a × 4b is equal to (Circle one) 

(A) 7ab^{ } 
(B) 12ab^{ }  (C) 12a^{b }  (D) 12b^{a }  (E) 7(a + b)^{ } 
(F) 12(a + b)^{ }


b) 
The expression 7p  4p is equal to (Circle one) 

(A) 3p 
(B) 11p  (C) 28p  (D) 3p^{2}  (E) 11p^{2} 
(F) 28p^{2}
^{ }


c) 
The expression 5m + 3m is equal to (Circle one) 

(A) 8m 
(B) 15m  (C) 8m^{2}  (D) 15m^{2}  (E) 8m^{m} 
(F) 15m^{m}
^{ }


d) 
The expression 8t ÷ 4t is equal to (Circle one) 

(A) 2t 
(B) 2t^{2 }  (C) 2t^{t}  (D) 2 ÷ t  (E) 2 