Priya followed this set of instructions to make quadrilateral ACBD, 1. Draw 2 points: A and B.
2. Draw a circle centered at A with radius AB.
3. Draw a circle centered at B with radius AB
4. Label the intersection points of the circles C and D.
5. Draw segments AC, BC, AD, and BD.
Choose a description you can be sure is accurate for the shape she constructed.
OA) 2 congruent sides, but not all 4
O B) 4 congruent angles
O C) 4 congruent sides
OD) 4 congruent sides and 4 congruent angles

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".