Which expressions are equivalent to the one below? check all that apply. 21^x/3^x a.(21/3)^x b.7 c.7^x d.(21 - 3)^x e.7^x*3^x/3^x f.3^x

options:  A,C,E are correct.

Step-by-step explanation:

We have to find the expression equivalent to the expression:

we know that:

Hence,

-----(1)

A)    (same as(1))

Hence, option A is correct.

B)  7 ; which is a different expression from (1)

Option B is incorrect.

C)   (Same as (1))

Option C is correct.

D)   which is a different expression from (1)

Hence, option D is incorrect.

E)   ; which is same as (1)

Hence, Option E is correct.

F)  ; which is not same as expression (1)

Hence, option F is incorrect.

each side has a different length.  

step-by-step explanation: