Which one of the following compound inequalities has no solution? 7x – 8 > 9(x - 1) and 3x + 2 < 5x + 3
– 2x + 5 > – 3x – 2 and – 3x – 2 > -2x + 4
- 2x + 5 < – 3x – 3 and - 4x +9 > – 5x + 2
3(x - 1) > 4(x - 2) and 2(x + 2) < 5(x - 1)

Sandy works at a clothing store. she makes $7 per hour plus earns 15% commission on her sales. she worked 75 hours over the last two weeks and had a total of $2,566 in sales before taxes. which of the following is closest to how much she will earn in hourly wages and commission for those two weeks?

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?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days