I need a little help on this.

The sum of two numbers is 86, and their difference is 20. find the two numbers

Measures of the angle of r, 31 s (x+4) t (3x+9)

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