Benjamin has 10 bills that add up to $320. Some are 50-dollar bills, and the rest are 20-dollar bills. How many $50 dollar bills and $20 dollar bills does he have?

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?