(5 + x) + 0=5+x what is the property

Write a real-world word problem that can be solved by adding 34.99 and 5.79. then solve

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

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.