Diego graphed the lines y=3x - 7 and y = 3x + 2. He then said there is no solution to this system. Diego is correct, how can you explain to Diego that he did not have to graph the lines to know there would be no solution

Because they are parallel

Step-by-step explanation:

Since these lines both have a slope of 3, they are parallel and will never touch, therefore they have no solutions.

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".

ian gone lie this got me confused

step-by-step explanation: