Working together, it takes two roofers 12 hours to put a new roof on a portable classroom. if the first roofer can do the job by himself in 16 hours, how many hours will it take the second roofer to do the job by himself?

Let r and s be the respective rates in roofs per hour.

The second worker's rate is 1/48 roofs per hour or one roof every 48 hours.

168

step-by-step explanation:

i am pretty sure that the answer is 168

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation: