The constant term of the expression is the fixed rental fee pf $50
Expressions and function
A mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.
An expression also consists of variables and constants. For instance, given the expression
g(x) = 2f(x) + b
The value of 2 will be the coefficient while the value of b is the constant. Given the expression that represents the total charges, which includes a fixed rental fee and an hourly fee, where x is the hours of rental as;
g(x) = 15x + 50
where
15 is the coefficient
50 is the constant
Therefore the constant term of the expression is the fixed rental fee pf $50
