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factor completely

Collin did the work to see if 10 is a solution to the equation r/4=2.4

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 the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.