If AB = 20, and BC = 10, what is AC?

Is every rectangle is a parallelogram? true false

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

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys