What are the similarities and differences between these data sets in terms of their centers and their variability? data set a: 1, 2, 4, 1, 9 data set b: 2, 7, 8, 12, 1 select from the drop-down menus to correctly complete the statements. comparing the centers of the data sets, the median for data set a is the median for data set b. further, based on the range, data set is more variable

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".

8

step-by-step explanation: