How would i solve this problem 5 1/4 - 2 5/6

The mathematical expression 9€ t means

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

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?