The mean temperature for the first 4 days in january was 1°C. The mean temperature of the first 5 days in January was 2°C. What was the temperature on the 5th day?

Answer:Step-by-step explanation:mean is average, so if we label the first through fifth days of january a-e we can solve it.So average of the first four is (a+b+c+d)/4 = 1 and the first five is (a+b+c+d+e)/5 = 2.  Since it's easy, let's get rid of the fraction in both.(a+b+c+d)/4 = 1 and (a+b+c+d+e)/5 = 2a+b+c+d = 4 and a+b+c+d+e = 10Now, we know a+b+c+d is 4, so we can replace that in the second equationa+b+c+d+e = 104 + e = 10e = 6ad since e is the fifth day, we know the temperature of it.  Let me know if something here didn't make sense.