Atabletop is in the shape of a trapezoid. the lengths of the trapezoid's parallel sides are 48 inches and 40 inches. the height of the trapezoid is 24 inches.

what is the area of this tabletop?

112 in²

1056 in²

2112 in²

23,040 in²

Correct choice is B

Step-by-step explanation:

The area of trapezoid can be calculated using formula

Since AD=40 in, BC=48 in and DF=24 in, then

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".