Free points bcuz finished all my work and I'm so happy

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)

Which statements are true about the linear equation y> 3/4x-2? check all that apply

Which size random sample is likely to provide the most trustworthy results