Billy’s Restaurant ordered 200 flowers for Mother’s Day. They ordered carnations at
$1.50 each, roses at $5.75 each, and daisies at $2.60 each. They ordered mostly
carnations, and 20 fewer roses than daisies. The total order came to $589.50. Write
a system of linear equations that can be used to find c, the number of carnations, r,
the number of roses, and d, the number of daisies.

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.