Find the value of x in each case.

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

Just tell me how to set up the equation.