Which of the sets of ordered pairs represents a function? a = {(3, −5), (4, 6), (−3, 9), (2, 7)} b = {(2, 4), (−1, −7), (5, 6), (4, 3)} only a only b both a and b neither a nor b

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

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)