How can I figure this out? What is |-9-3|?

Shryia read a 481 -page-long book cover to cover in a single session, at a constant rate. after reading for 1.5 hours, she had 403 pages left to read. how fast was shryia reading? pages per hour how long did it take her to read the entire book? hours plz i realy need this

Need on this one asap im almost done with this subject

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?