Express the area a of a rectangle as a function of the length x if the length of the rectangle is twice its width

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

The liabilities of cullumber are $99,000. owner’s capital is $143,000; drawings are $96,000; revenues, $467,000; and expenses, $301,000. what is the amount of cullumber company’s total assists?