(a) Company D has the least variability because it has the smallest range.
(b) Company A has the highest salaries, on average, because it has the largest mean salary.
Solution,
-28x^2+35x
take the common,
-7x(4x-5)
The answer is -7x(4x-5)
Here,
If we solve,
-7x(4x-5)
Then, the answer would be:
= -7x*4x+7x*5
= -28x^2+35x
Hope it helps
Good luck on your assignment
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