Which number line shows the solution set for |y-9| < 12

Option c

or

Step-by-step explanation:

The absolute value is a function that transforms any value x into a positive number.

Therefore, for the function  x> 0 for all real numbers.

Then the inequation:

has two cases

   if  (i)

   if (ii)

We solve the case (i)

We solve the case (ii)

Then the solution is:

or

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: