A group of men decided to do a job in 8 days. But since 10 men dropped out everyday, the job got completed at the end of the 12th day. How many men were at the begining?

165

Step-by-step explanation:

∵ND=N₁D₁+N₂D₂+N₃D₃−−−−−−−−N₁₂D₁₂

8x=x×1+(x−10)×1+(x−20)−−−−−(x−110)×1

8x=12x−10−20−30−−−−−−−−110

4x=10+20+30−−−−−110

4x=11/2[10+110]

4x=660

x=165

c

step-by-step explanation:

there is vertical asymptote at x = 2 and x = 0

vertical asymptote occurs at the points where the denominator is 0. so we can say that

x = 2 occurs when there is a factor (x-2) in the denominator, and

x = 0 occurs when there is a factor "x" in the denominator

thus, the denominator of the equation would have "x * (x-2)", this is option c only. that's the correct answer.

  answer:

  write 548 as 500 + 40 + 8. multiply each addend by 5. then add the three products to get 2,740.