Duane and nick are saving their money to build a tree house. duane a adds $5 to their piggybank every other week. mick adds $2 every week. so far they have saved $45. how many weeks have they been saving their money?

Kathy spent 5/8 of her money on books and another 1/6 of her money on stationeries.what fraction of kathy’s money was left?

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?

[15 points, algebra 2]simplify the complex fraction and find the restrictions.