Correct Question is: Find the illegal values of b in the fraction
(2b^2 + 3b - 10)/(b^2 - 2b - 8)illegal values are those which are not a part of Domain. In this case these will be such values which will make the denominator of the fraction zero.
So setting the denominator equal to zero, we can find these values.
Thus, b=-2 and b=4 are the illegal values for this expression
I think that x would be 1.5.
6 = 4x, 6/4 = 1.5, so 1/5 = x
What is the shape for your problem?
Task 1 -----

minutes
Task 2 ----- 3 min 10 sec = 3+10/60 =

minutes
Task 3 ----- 1 min
Total time to make 1 item =

+

+1 =

minutes
In 25 minutes;
Number of items made = 25/(6 2/3) = 3.75 items = 3 items (since only a fully assembly can be regarded as an item).<span />