Answer: 10x
Step-by-step explanation:
Given:- Chris earns $10.00 each time he washes his neighbor’s car.
If the expression 10x represents Chris' earnings.
Then x must represent the number of time he did the car wash in all.
So that,
The combined earning= Earnings per carwash X Number of times he did car washes. =(10)(x) =10x
Hence, the variable x represents the number of times be did the car wash.