About 12 weeks ago, there were 36 mold spores found in a garden. after a few weeks of observation, it is determined that the number of mold spores in the garden is tripling every 6 weeks. the number of mold spores, m, at any given time in the garden is equal to the product of the initial amount of spores, i, and 3 to the power of n, where n is the number of times the amount of mold spores has tripled.

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".

lol

step-by-step explanation: