Megan buys 3 bracelets and 3 necklaces. each bracelet cost $5. megan pays the clerk $40 and gets $4 change. what is the cost, in dollars, of one necklace.

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