Which of the following equations has no solution? A) 7 - z = 3 + z + 4 - 2z
B) 5(a + 4) - 15 = -5(a - 1)
C) -2d + 4d - 4 = 5 + 3(d - 3)
D) -11(n - 2) + 8(n + 1) = -3(n + 10)

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.