7. If the length of the side of a table is 3 more than twice its width, what is the expression of its perimeter?
a. Draw an image and show all your work to demonstrate your thinking and
understanding of this problem.
b. If the perimeter is 30, what is the width of the table? Show your work

Step-by-step explanation:

Width =w

Length = 2w + 3

Perimeter = 2*(length +width)

                = 2*(2w +3 + w )

                 = 2*(3w + 3)

                = 6w + 6

b) Perimeter = 30 units

6w + 6 = 30    

Subtract 6 form both sides

6w = 30- 6

6w = 24

Divide both sides by 6

6w/6 = 24/6

w = 4

l = 2w + 3

 = 2*4 + 3

 = 8 + 3

 = 11

Length = 11 units

Width = 4 units