Ms. Swanson asked the question, "How does knowing the fact 6×5 help you find 60×500?" Maria answered, "I know 6×5 is 30. Now all I have to do is count the zeros and I get 3,000." Use place value understanding to explain why her answer is incorrect.

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