Help me pls
Find the sum.
(2w-9)+(-4w-5)

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

Need same math paper but the back now i hope your able to read it cleary i need with hw

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.