Someone help please!

Find the value of x for which abcd must be a parallelogram -9-6x x-30

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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.