One-third of a number is at least 5 units from 31

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Which graph represents the parent function of y=(x+2)(x-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.