The number of newly reported crime cases in a county in New York State is shown in the accompanying table, where x represents the number of years since 2006, and y
represents number of new cases. Write the linear regression equation that represents
this set of data, rounding all coefficients to the nearest tenth. Using this equation,
estimate the calendar year in which the number of new cases would reach 767.
Years since 2006 (x) New Cases (y)
0
996
1
923
2
882
3
892
4.
840
5
813

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".

step-by-step explanation: