Wednesday Driving Problem

Katherine drives 27 miles to work each day. On Wednesday she drove x extra miles for errands. Write an expression for total miles driven Wednesday.

Symbol definition: x = extra miles from errands.

27
Daily Miles
Known constant
+
x
Extra Miles
Unknown variable
=
27 + x
Wednesday Miles

Commuting + Errands Expression

This problem combines a fixed daily distance with unknown extra miles from errands.
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1. Identify the Constant

Katherine drives 27 miles to work each day. That fixed value is our constant.
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2. Identify the Variable

The extra errands distance is unknown, so use x to represent those miles.
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3. Build the Expression

Total Wednesday miles = normal commute + extra errands = 27 + x.
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Your Turn

Enter an equivalent form of the same expression.
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Wednesday Miles Calculator

Translate the expression directly into code to compute total mileage.

calculateWednesdayMiles.ts
function calculateWednesdayMiles(extraMiles: number): number {
  const normalCommute = 27;

  // Expression: 27 + x
  return normalCommute + extraMiles;
}

console.log(calculateWednesdayMiles(8)); // 35
Expression to Code
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