The length of a rectangular room is 6.9 m and its width is 9.6 m. find the area of the room.

66.24 m2

33 m2

92.16 m2

47.61 m2

Solution:

It is given that length of a rectangular room is 6.9 m and its width is 9.6 m.

So We have ;

So We have to find the area of the room.

We know :

Area of Rectangular room = Length of Rectangular room × Width of Rectangular room

Area of Rectangular room = 6.9 m × 9.6 m

Area of Rectangular room = 6.9 m × 9.6 m Area of Rectangular room = 66.24 m²

Therefore, Required area of the room is 66.24 m².

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".