Which of the following items is the best buy: a 12-oz can of soda for $1.99,a 10-oz can of soda for $1.89,or an 8-oz can of soda for $1.20?

Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)