Two trains are heading two the same destination the first train left an hour earlier, the second traveled in the opposite direction 50mph faster than the first train for four hours after which they were 380 miles apart. How fast did the first train travel.

With both problems. a.s.a.p directions on photo ^

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

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.