Afaucet is used to add water to a large bottle that already contained some water. after it has been filling for 4 seconds, the gauge on the bottle indicates that it contains 12 ounces of water. after it has been filling for 11 seconds, the gauge indicates the bottle contains 26 ounces of water. let y be the amount of water in the bottle x seconds after the faucet was turned on. write a linear equation that relates the amount of water in the bottle, y, to the time x.

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".