Barbie's bag is half full with 30 tennis balls in it. If she takes half of the balls from Ken's bag, then her bag is two-thirds full. The original number of tennis balls in Ken's bag was...​

Choose the correct classification of 3x4 − 9x3 − 3x2 + 6. 5th degree polynomial 4th degree polynomial 9th degree polynomial 24th degree polynomial

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

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?