If Jenna swap 7 laps and it took her 3 minutes to swim each lap, which picture represents the total amount of time it took Jenna to swim?

1.) 2x + y = 3 2.) x - 2y = -1 if equation 1 is multiplied by 2 and then the equations are added, the result is a.3x = 2 b.3x = 5 c.5x = 5

What properties allow transformation to be used as a problem solving tool

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5