Please help me solve this problem please

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

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

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?