Alex's friend pablo comes up with an exact equation to find out how many bags he needs. use his equation

to find out how many bags will actually be needed if b = x(2x+7)+3(2x+7)+(x+4) (2x +7), where the

quantity (2x + 7) equals 4. show how you arrive at your answer.

8.5 bags are needed.

Step-by-step explanation:

Given : Number of bags needed

To Find :  how many bags he needs?

Solution :

Now we are given that Number of bags needed

Substitute the value of x

Hence 8.5 bags are needed.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square