Question

what is the coefficient in the following expression? $5a^2 - 7$

Explanation:

Step1: Define coefficient

A coefficient is the numerical factor multiplied by a variable term.

Step2: Identify variable term

In $5a^2 - 7$, the variable term is $5a^2$.

Step3: Extract numerical factor

The numerical factor of $5a^2$ is 5.

Answer:

5 (Option: 5)