Find the difference (6x2 - 4x - 5) – (3x? - 7x + 2)
A. 9x2 + 11x + 7
B. 3x2 + 3x –7
c. 9x2 – 11x - 3
D. 3x4 – 11x2 – 7

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.