Maria is buying new carpet. her bedroom is in the shape of a square and the length id each side is 12 feet. write and simplify an exponential expression to find how much carpet she needs.

She needed 144 square feet of carpet.

Step-by-step explanation:

Given : Maria is buying new carpet. Her bedroom is in the shape of a square.

The length of each side is 12 feet.

We know that the area of square =

So , the area of the bedroom =  [which is an exponential expression]

Simplify it

The area of the bedroom =

Also, the carpet she needed = Area of the bedroom.

Thus , She needed 144 square feet of carpet.

its 4 because 2 times 2 is 4, if you double the number two you get four

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".