One week, Lexy went to the donut shop to bring breakfast for her coworkers and she paid $18.40 for 4 coffees and 12 donuts. The next week she paid $2.40 more for 7 coffees and 9
donuts. Which system of equations can be used to find the price per coffee, x, and the price
per donut, y?*

Percent increase and decrease. original number: 45 new number: 18

Write the function for the graph. (1.8) (0,4)

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.