Use algebra tiles to find the difference. let one white tile equal +1 and one black tile equal –1.

Since you have not mentioned any numbers to find the difference, I will assume the numbers on my own to be 6 and (-9).

To find the difference of these two numbers, you will need 6 white tiles and 9 black tiles.

Now to subtract (-9) from 6, you need the 9 black tiles to be replaced with 9 white tiles and change the subtraction sign to addition. Adding them will give you a result of 15 which will be white tiles.

6 - (-9) = 6 + 9 = 15

15 white tiles

i believe the answer is 323 ft

step-by-step explanation: