What is the answer to these? And how do you do them? Brainliest to best answer NO BOTS WILL BE ACCEPTABLE

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180