Answer:
8xy that is the answer...................
Well if there is 28 feet, that would be (12x28) 336 inches, and 16 inches between the plug and the first light, there would be only 320 inches left for lights. therefore, if there are 4 inches between each light, we divide 320 by 4. the answer we get is 80. there are 80 lights.
Just read what it says not that hard go to the left twice and go up 4 units.
Hope you have a good day


Kelly can type 200 words in five minutes.