Solve the system of equations algebraically.

2x+y=5
3x−3y=3
(x, y)= (

Ineed with number 6 , explain how to get 1978

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.

Solve for x where 0 equation: cot^2x+2cotx+1=0