Julie bought some shirts for six each the mark marge bought some shirts for eight dollars each the girls spend the same amount of money on shirts what is the least amount they could spend

24 dollars

Step-by-step explanation:

6 12 18 24

8 16 24

the first to match up is 24 so that is the least they could have spent

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".