The reasoning would be that it was given because there's no theorem or anything involved it was simply given to you already
Set up the proportion of $ on one side and percents on other. You can put x for the retail value of the hat and 16 on the bottom. Then on the other side put the percentage of the added markup plus 100% which is the original price on the top over 100%. It should be something like x/16 = 155/100. The cross multiply. (x)(100) = 100x and (16)(155) = 2480. Then divide 2480 by 100 to isolate the x. Your final answer will be x = 24.80 which is the retail price.
Answer:
(x-4) (x+4) (x-4)= r3 - 4r - 16r + 64
Step-by-step explanation: