For this case we have that by definition, a linear equation is of the form:

The variable (s) involved in the equation always have exponent 1.
Some examples of linear equations are:

Answer:
In a linear equation the variables have exponent 1.

Answer:
A.
Step-by-step explanation:
the second number is just 10 more than the first
Answer: positive
The absolute value of every nonzero integer is a positive integer.
Examples are
|-2| = 2
|7| = 7
The absolute value represents distance which can never be negative. Negative distance does not make sense.
Answer:
53.13
Step-by-step explanation:
Answer:
false
Step-by-step explanation:
Not all parallelograms are rectangles, only some of them are.