Well, if you're following PEMDAS (Parentheses, Exponents, Multi/Div, Add/Sub), yes, first you would multiply 4x2, then since it's all adding and subtracting, you would go left to right, so if I'm right.. 5-8+8-1 is the equation you'd need. So.. 5-8=-3 -3+8=5-1=4. If I'm right, then 4 is your total. Hope that helped!
The variable "d" is the independent variable because its value does not depend on another variable. The variable "m" is the dependent variable because its value depends on the value of the variable "d"