Which answer describes the transformation of f(x)=x2−1 to g(x)=(x+2)2−1 ? a horizontal compression by a factor 2 a horizontal translation 2 units to the left a vertical translation 2 units down a vertical stretch by a factor of 2

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)