Reflection and Discussion
Casey was given the problem 57 + 274. He knows that addition is commutative, so the answer
to 57 + 274 is the same as 274 +57.
He wondered whether it was easier to solve 57 + 274 OR 274 +57.
What do you think?

Select the sequences that are geometric.

Find the distance between (7,-6) and (-3,-9)

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14