5. Malia is planting a garden in her yard. The dimensions are represented by x+4 feet and x+8 feet. She needs fencing to go around the perimeter of the garden to keep animals out. a. Write a polynomial that represents the amount of fencing she will need in feet.

b. She has 72 feet of fencing in the shed. If x=13 feet, does she have enough fencing on hand for the garden? Explain your reasoning.

i need help in this one i don’t understand .