Math Word Problem
posted by Shane .
Ron is tiling a countertop. He needs to place 54 square tiles in each of 8 rows to cover the counter. He wants to randomly place 8 groups of four blue tiles each and have the rest of the tiles in white. How many white tiles will Ron need?

54 rows of 8 use 432 white tiles
8 groups of 4 blue tiles use 32 tiles
that leaves 43232 = 400 white tiles 
400

PATIO A landscaper has 125 tiles to build a square patio.
12 in.
12 in.
The patio must have an area of at least 80 square feet.
a. What are the possible arrangements for the patio?
b. How many tiles are not used in each arrangement? 
What is the cost of 3 but oak trees