Given :
Service cost , c = $40.
Amount paid for each message , m = $0.02 .
To Find :
Equation represents the total cost C in dollars for a month when eric send t text message.
Solution :
Let , total cost be C .
It is an linear equation with slope equal to 0.02 and y-intercept equal to 40.
So ,
 
Hence, this is the required solution.
 
        
             
        
        
        
I don’t get this question right here
        
             
        
        
        
If you distribute -5 to the things in the parenthesis you would get 10k-20 which is the same as -5(-2k+4)
        
             
        
        
        
Answer:
 12
Step-by-step explanation:
divide 90 by 3 then take that and divide it by 5 then multiply that by 3 then subtract that from the answer of 90 divide by 3
 
        
             
        
        
        
Amount of tax paid = 43-40 = 3
Tax rate = 3/40 = 0.75
0.75 x 100 = 7.5%
Tax rate = 7.5%