A plumber needs to transport a 12 foot pipe to a jobsite. The interior of his van is 90 inches in length, 40 inches in width and 40 inches in height. Will the pipe fit inside his van?

No

Step-by-step explanation:

First, convert all dimensions to be uniform.

1ft=0.08333 ft

90ft=90*0.0833=7.5ft

40 ft=40*0.0833=3.33 ft

The diagonal of the vehicle will be

Since the diagonal of vehicle is smaller than 12 ft, the pipe can't fit unless divided into two equal parts.

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".