If you need to construct a dog run for your dog and the total perimeter needs to be 40 feet, and you only have enough room to make it 5 feet wide, how long can you make the dog run?

15 ft

Step-by-step explanation:

Given

The total perimeter needed is

The available width of the room is

Suppose l is the length of the room

So, the perimeter of a rectangle-shaped room is

Putting values

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.

486in is correct

step-by-step explanation: