How do you find the perimeter of a given shape?

What is the measure of ac? 5 units 13 units 26 units 39 units

Find the vertex of the function given below y=x^2-6x+1

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