Eric and Sarah both have lemonade stands. The graph below represents how many cups of lemonade Eric sells per day. The equation represents the rate at which Sarah makes lemonade. Who sold more cups of lemonade in 5 days? ​

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)