Justify each step of the solution by stating the property that was used to get to each step. given: step 1: step 2: step 3: 17x = 40 step 4:

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

Which is a graph of a proportional relationship?