A washing machine is filling up with water at a constant rate. The rate is 3/4 of a gallon in 1/5 of a minute. Don calculated the unit rate to be 3/20 of a gallon per minute. what did he do wrong?

gallon per minute

Step-by-step explanation:

Given parameters:

Quantity of gallon = gallon

Time taken  = min

Unknown:

The solution is gallon per minute, what did he do wrong = ?

Solution:

To find the rate:

   Rate  =

 Input the parameters and solve

  Rate  =   =  ÷

                       Invert the  to give 5

                  =   x 5

                  = gallon per minute

The student failed to invert the before multiplying with  

look in attachments

step-by-step explanation:

a = (-2, 0)

b= (-4, 0)

c = (-5,2)

d = (-1,2)