A Company charges seven dollars for a T-shirt and ships any order for $15 a school principal order in number of T-shirts for The school Store the total cost of the order was $1520 which equation can be used to find the number of shirts ordered?

7t + 15 = 1520

he ordered 215 shirts

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".

answer: howdy

step-by-step explanation: