A 3
B 4
C -2
D 2
Please I need help

Simplify the expression. -2/5(10+15m-20n)

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

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?