I need help with this question 1/2 + 2 3/4=?

Which expression is equivalent to? assume x > 0 and y > 0.

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer