Adding and subtracting fractions
solve each problem. write your answer as a mixed number(if possible)

1. 2 1/9 - 7/6= 2. 2/3 + 2/4=

3. 32/6 - -4 5/7= 4. 23/9 + 5/2=

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.