Hello, thank you for taking the time to post your question!
I think it just wants you to use the information to set up an equation … if you let “h” be Diane’s height, the equation here is
10 + h = 44
Solving for “h” algebraically then yields
h = 44 – 10 = 34
so Diane’s height here is 34
I hope that helps you get moving in a better direction on this type of question! Feel free to reach out if you have any additional questions beyond that :)