Please help with this? When solving the equation 3n2−15n=3 by completing the square, what is your first step?

Subtract 3 from each side of the equation.

Divide each side of the equation by 3.

Add 15n from each side.

Divide −15by 2 and square the result.

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?