There are 26 trucks, each with a 4-ton payload, are needed to unload a freight train. how many trucks with a 6.5-ton payload would be needed to do the same job?

16

Step-by-step explanation:

Lets first start off with what we know. We know that if we have 26 trucks with a 4-ton payload each, we will be able to unload a freight train. In total, unloading a freight train will require a 104-ton payload because...

(26 trucks) x (4-ton payloads) = 104 tons

Since we know that a freight train can carry 104 tons, we can just do some simple math to figure out the rest of the problem.

(? trucks) x (6.5-ton payloads) = 104 tons

All we do now is divide 104 by 6.5 to get our answer.

104 / 6.5 = 16

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".