Help plz It’s due in an hour

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

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Solve the formula ax+ by = c for x.