What is 2 + 1 I'm super stuck XD

What is the common denominator for 3/5+3/4

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

An equation where variables are used to represent known values—function notation true or false