A square wall is covered with sqare tiles. There are 85 tiles altogether along the two diagonals. How many tiles are there on the whole wall?​

There are 1849 tiles on the whole wall.

Step-by-step explanation:

If there are 85 tiles along the two diagonals, we can use the following rule:

So we have 43 tiles in the first diagonal and 85-43 = 42 in the second diagonal.

Now, as we have a square the side will have 43 tiles so the total area will be cover with:

Therefore, there are 1849 tiles on the whole wall.

I hope it helps you!                              

step-by-step explanation:

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step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)