20 points!for the rectangle provided, the length of this rectangle is 5 mm longer than its width. the perimeter of this rectangle is more than 42 mm. let w equal the width of the rectangle. a) define the length of the rectangle in terms of w (the width). b) use the expressions to write an inequality based on the given information. c) solve the inequality, clearly indicating the width of the rectangle.

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".

1/2*qr*rs

step-by-step explanation: