Given the task definition and input, reply with output. You are given a math word problem and you are supposed to apply an addition mathematical operator on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: Rachel had to complete 9 pages of math homework, 11 pages of reading homework and 29 more pages of biology homework. 

 Question: How many pages of math and reading homework did she have to complete?

20