David bought a computer that was 20% off the regular price of $1,080 if a 8% scales tax was added to the cost of the computer what was the total price david paid for it

$1,080 * .20 = 216

So there's the sale price $216.

Then you knock it off the original price so $1,080 - $216 =  $864.

Then the tax is 8% so 864 x .08 = 69.12.

864 + 69.12 = $933.12 I believe is your answer.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm