You are planning to build a walkway that surrounds a rectangular garden, as shown. The widths the walkway around the garden is the same on every side. a) Write a polynomial that represents the combined area of the garden and walkway.

i don’t see a picture

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x