Is this a triangle :/

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

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

Which expression is equivalent to -5(3x - 6/7)