Identify the translation rule on a coordinate plane that verifies that triangle a(-5,1), b(-2,7), c(0,1) and triangle a'(-3,2), b'(0,8), c'(2,2) are congruent. a) (x, y) → (x - 1, y + 2) b) (x, y) → (x + 2 , y + 1) c) (x, y) → (x - 2, y + 1) d) the triangles are not congruent

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)