Can somone pls help me with this ASAP becuase your girl is dumb

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?

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.

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20