Plzzz help me not good at maths

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

What is the shape of the height and weight distribution

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