The expression 3C2 represents the number of ways of:
a. choosing 2 items at a time from a set of 3. c. arranging, in order, 2 items from a set of 3.
1 b. choosing 3 items at a time from a set of 2. d arranging, in order, 3 items from a set of 2.

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