Question

I really need help !!!

Answer 1

I think it's A, so it can be calculated how many tiles is needed to cover the whole patio.

Answer 2

Let's do this using the process of elimination. Since you didn't include choice D, we can only use A, B, and C.
     C: If we're finding the width of the patio, how is the thickness of the tiles going to help? C is wrong.
     A: We already know the area (72), so how does knowing the perimeter help us? All we know using that information is that 2 pairs of numbers give us the perimeter & also multiply to get 72. But not which 2. A is wrong.
     B: Pay more attention to the last part of B... "the length". Well, if we have the area (72), and we have the length, then we can do area/length-width to find the width. B is correct!

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