Answer:
10
Step-by-step explanation:
- <u><em>5</em></u> is the coefficient
- <u><em>x</em></u> is the variable
- <u><em>+</em></u> is the operator
- <u><em>10</em></u> is the <u><em>constant</em></u>
No because of it is not an idiom
N is the variable I believe.