Find the area and select one of the answers in the file

What is the area of the trapezoid shown ?

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

Factor the expression using the gcf. the expression 21m−49n factored using the gcf