If a polynomial function f(x) has roots -9 and 7 - 1, what must be a factor of f(x)? A (x – (7 + 1))
B (x- (-7-))
C (x + (7 + 1))
D (x + (7 - 1))

Whats the name of the vertical axis

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?