Afreight train and an express train leave towns 390 miles apart at the same time, traveling toward one another. the freight train travels 30 mph slower than the express train. they pass one another 3 hours later. what are their speeds?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length