The base of the rectangular pyramid shown has an area of square inches
A triangular face with a base of 10 inches has an area of square inches.
A triangular face with a base of 5 inches has an area of square inches.
The total surface area of the pyramid is square inches.

ThThe answer is in order cause I did of on edginuity:50,28,17.75,141.5

the fist one is not equalvalent but i think th second one isand the third isnt definetly or the last one is i think. hope this !

step-by-step explanation:

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".