At the beginning of the day the stock market goes down 4014 40 1 4 points and stays at this level for most of the day. at the end of the day the stock market goes up 9012" role="presentation"> 90129012 90 1 2 points from the low at the beginning of the day. what is the total change in the stock market from the beginning of the day to the end of the day? the total change in the stock market is points. points from the low at the beginning of the day. what is the total change in the stock market from the beginning of the day to the end of the day?

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

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