Show work please 15 pointsss

Leeanne plans to sell her car and places an x-line ad. The newspaper charges p dollars for the first k lines and e dollars per extra line, to run the ad for a week. a. When x > k, write an algebraic expression for the cost of running the ad for a week. b. When x < k, write an algebraic expression for the cost of running the ad for two weeks.

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

Find the percent error of the measurement 4 cm

Ineed to know how to write question one in mathematical terms