Question

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.

Answer 1

8.5 bags are needed.

Explanation:

Given : Number of bags needed
`B=x(2x+7)+3(2x+7)+(x+4)`

`(2x + 7) = 4`

To Find : how many bags he needs?

Solution :

`(2x + 7) = 4`

`2x=-3`

`x=-(3)/(2)`

Now we are given that Number of bags needed
`B=x(2x+7)+3(2x+7)+(x+4)`

Substitute the value of x

`B=((-3)/(2))(2((-3)/(2))+7)+3(2((-3)/(2))+7)+(((-3)/(2))+4)`

`B=8.5`

Hence 8.5 bags are needed.