Final answer:
Madilyn's earnings can be calculated by multiplying her hourly rate of $7 by the number of hours she works (X), resulting in the expression $7 × X.
Step-by-step explanation:
To find out how much money Madilyn earned by working X hours at a rate of seven dollars per hour, you can write the expression as follows:
To find out how much money Madilyn earned, you can use the formula: Earnings = Hours worked * Rate per hour.
In this case, Madilyn worked X hours at a rate of seven dollars per hour. So, the expression to calculate her earnings would be: Earnings = X * 7.
For example, if Madilyn worked 10 hours, her earnings would be: 10 * 7 = 70 dollars.
Earnings = Hourly Rate × Number of Hours Worked
In Madilyn's case:
Earnings = $7/hour × X hours
To illustrate this with an example, if Madilyn works 10 hours, her earnings would be:
Earnings = $7/hour × 10 hours = $70