Which ratio it's less then 7/9 I need help ASAP

Name the most appropriate metric unit for each measurement

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.

If f(x)=3 over x+2 - square root x-3 then f(7)=