Answer and Explanation:
The coefficient of a variable is the number that the variable is multiplied by.
In the given expression:

we can identify the coefficient of the variable
as 5.
Next, we can find the value of the expression when u = -3 with the following steps:

↓ plugging in -3 for


↓ executing the multiplication ...


↓ executing the addition ...


↓ executing the division ...

