Solve the system of equations by elimination.
-7x - 8y =9 and -4x + 9y = -22

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Indicate the formula for the following conditions: p^c(n,r)=

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.