Please find the area of the figure and give an explanation

Perimeter= L+W

Step-by-step explanation:

2.1+7.2+7.8+2.1+7.2=26.4 cm

163.08 cm^2

Area: First find the length of the missing lengths. One length needed to be found which is the top space congruent to the 2.1cm... To find that length:

Let's think that length as, " x "

2.1 + 3.4 + x = 7.8

5.5 + x = 7.8

x = 7.8 - 5.5

x = 2.3

Now with ease we can find the area.

2(2.1 * 5.4) + 7.8( 7.2-5.4)

2 * 11.34 + 78 * 1.8

22.68 + 140.4

163.08

Brainliest pwease if my answer is correct! <3

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".

6 on both sides and twelve on the top and the bottom

step-by-step explanation: