How do i do this prob -6(4x+1)+7x+9(x-3)=4

Find the vertex of the function given below y=x^2-6x+1

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

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.