A bag contains eleven equally sized marbles, which are numbered. Two marbles are chosen at random and replaced after each select
2 answers:
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- Opposite side to <WYX=WX
- Opposite side to <XWY=XY
Here
- WX=12
- XY=15
As
- WX<XY
Solving a polynomial inequation
Solving the following inequation:
(x - 8) (x + 1) > 0
We are going to find the sign both parts of the multiplication,
(x - 8) and (x + 1), have when
x < - 8
-8 < x < 1
1 < x
Then we know (x - 8) (x + 1) > 0 whenever (x - 8) (x + 1) is positive
We can see in the figure (x - 8) (x + 1) is positive when x < -8 and x > 1
Then
Answer:B