Answer:
a and b.
Step-by-step explanation:
I’ll explain by giving an example.
Let’s say that: a=3;b=4;c=5; => they all are consecutive -> their sum is 12.
=> if we use a) n=3 => 3*n+3=3*3+3=12 => correct.
b) n+(n+1)+(n+2)= 3+4+5=12=> correct.
c)n+2n+3n=3+6+9=18=>incorrect.
d)3n=3*3=9=>incorrect.
Example of linear equation:

Let's have the linear equation;

<h3 /><h3>Put x=1</h3>


<h3>Put x=2</h3>


<h3>Put x=3</h3>


Answer:
the answer is d
<em>The square root property should have been applied to both complete sides of the equation instead of to select variables.
</em>
<em />
Step-by-step explanation: i just took the test on edge
I think this is right if not oh well but the domain of marcos mapping diagram is paired with exactly one element in the range.