Evaluate algebraic expressions correctly using substitution and order of operations.
Compare cases by evaluating an expression
Problem
A snack stand uses the rule \(4n~+~3~\text{dollars}\). Customer A buys \(5~\text{drinks}\), and Customer B buys \(7~\text{drinks}\). Evaluate the rule for \(\text{both}~\text{customers}\), report \(\text{both}~\text{totals}\), and state the higher-paying customer.
Big Picture
What this problem is really about
Apply the same cost rule separately to each customer rather than comparing drink counts alone. Substitute each input, multiply by the per-drink amount, and include the fixed charge in both evaluations. Once both dollar totals are complete, compare the outputs and report which customer pays more.
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