Rob has a combined flower and vegetable garden back is 9 m long and 11 m wide. the flower garden is in the center and is a square with sides of 3 m. how many square meters of the garden is used for vegetables?

First you would need to find the area of both the FULL veggie garden and flower garden.
Veggie Garden - 9×11=99
Flower Garden - 3×3=9
Then you would subtract the area of the veggie garden by the area of the flower garden.
99-9=90 meters squared