Square ABCD is shown below with line EF passing through the center: Square ABCD is shown with line EF running horizontally through the center of the figure. If Square ABCD is dilated by a scale factor of two about the center of the square, dilated line E'F' will (6 points) A be parallel to line EF and pass through point C B contain the points E and F C. be perpendicular to line EF and pass through point A D. shift two units to the right

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Step-by-step explanation:

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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".