Bobby think that 5^2 = 10. What is wrong with this answer

The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?

X-intercept=-5 y-intercept=2 the equation of the line is

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle