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Answer:
-7/4x-68
Step-by-step explanation:
 
        
             
        
        
        
Okay, so FIRST you would subtract 215 - 155, which is 60, and THEN
divide it by 215, so 60 divided by 215 = 0.27, and rounded that is 0.28,
then you move the decimal two places to the right to make it a
percentage so your answer would be A., 28%
I hope I helped! =D
        
                    
             
        
        
        
Answer:
160 cars 
Step-by-step explanation:
The computation of the number of more cars he washed this year is given below;
Last year, he washed 20 cars a week so on yearly basis he washed 
= 20 cars × 52 weeks
= 1,040 cars
And, this year he washed 1,200 cars
So, the number of more cars he washed this year is 
= 1,200 cars - 1,040 cars
= 160 cars