Question

The cost to purchase enough of a certain fertilizer to treat a garden is $.25 per square foot of the garden, plus $20.00 for shipping. Write an equation describing the cost in dollars to purchase fertilizer for a garden that is 12 feet longer than it is wide. Use x to represent the width of the garden.

Answer 1

Answer: I believe the answer is C=1/4x^2 +3x+20

Explanation:

Answer 2

For this case we have the following variable:
x: represent the width of the garden
So, the length of the garden is:
l = x + 12
The garden area is:
A = (x) * (x + 12)
Then, the cost equation is:
C = 0.25A + 20
Rewriting:
C = 0.25 * (x) * (x + 12) + 20
Answer:
An equation describing the cost in dollars to purchase fertilizer is:
C = 0.25 * (x) * (x + 12) + 20