Answer:
Option A and Option E
Step-by-step explanation:
By definition linear expressions have the following form:

where
or 
To answer the question, identify among the options the expressions that have this form:
Option A.

Where
and
and 
Option E.

Where
and
and 
It is 3 if im wron letme know
The answer is 25m.
Height = 15
Length = 25
Height+lengthx2= 80(perimeter)
Height x length=375m2(area)