Answer:
The required equation is 
Step-by-step explanation:
We are given that,
The number of hours Mike works = x
The number of total sales he has = y (in dollars)
Now, Mike earns $6.50 per hour.
So, the total amount Mike earns after working 'x' hours =
dollars.
Also, he earns 4% of the total sales.
Amount earned by Mike from the total sales = 4% of 'y' = 
Thus, the total earnings of Mike is given by,
Total earnings = Earnings per hour + Earnings through sale
i.e. 
<h3>The required equation is

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