Me asap because if i don’t finish it i’ll get in trouble

SA= wh+lw+lp+ls

SA= 3(2)+7(3)+7(2.5)+7(2.5)

SA=6+21+17.5+17.5

SA=27+35

SA=62

To find the surface area of this solid figure we add the area of all the faces

formula for area of triangle = 1/2 * base * height

So Area of two triangles = 2( 1/2 * 3 *2) = 6 in^2

And area of two lateral rectangles = 2( length * width) = 2( 2.5 *7 ) = 2(17.5)= 35 in^2

And area of base rectangle = (3*7) in^2 = 21 in^2

Now adding all the areas we get

(6+35+21) in^2 = 62 in^2

So surface area = 62 in^2

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".