9. oliver is 8 feet above the surface of the water. there is a school of fish
10 feet below the surface. a ledge with some seashells is 18 feet below
the surface, and even deeper there is a shipwreck 32 feet below
the surface.
a. how many feet will oliver have to travel to get to the seashells?
b. how much deeper is the shipwreck than the school of fish?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.