Ihave 3 problems that i don't understand on my home work can some one
1) jack wants to buy a pair of trousers for $60 when he went to the store he found that the price was marked down by 20% how much do they cost now
2) sally buys a hand bag there was a discount of 30% if sally paid $20 what was the original price
3)kelley wants buy a magazine that it's $25 later the magazine was marked up an additional 20% what is the new price

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).