Answer:
96 * 144 - 168 * 42
Step-by-step explanation:
So the area of the wall is 96 * 144
And the area of the tiled part is 168 * 42
So it would be 96 * 144 - 168 * 42
There's an app called photomath that would be useful for these kinds of problems!
Jeremy will need 3.75 rolls of fence to completely surround the garden but if you are rounding he will need 4.