If mr. arenth wants to put new carpeting in the room shown, how many square feet should he order l= 14ft. w = 6c-8ft. l= 5+3c ft.

By definition, the area is given by:

Where,

w: width

l: length

We have two expressions for the length:

Since the length is the same, we equate both expressions:

From here, we clear the value of c:

Then, we have that the width is given by:

Substituting the value of c we have:

Finally, the area is given by:

he should order 140 square feet

b, i believe, but not sure.