Find the width of a rectangular prism if the volume is 546cm, the height is 7cm and the length is 13cm

Width=6cm

7*13*x=546

91*x=546

Divide both by 91

x=6

7x13x6=546

answer: 180

step-by-step explanation:

12-2=10

20-2=18

10x18=180

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".