The first is independent of one another because the probabilities of picking the marbles doesnt change because the first marble was placed back in. Now the second one is dependent because the first card picked wasnt placed back which changes the probability of the rest of the cards.
Answer:
Step-by-step explanation:
Answer:
The equation is equal to
Step-by-step explanation:
Let
x -----> the number
we know that
The equation that represented the problem is equal to
Solve the quadratic equation by graphing
The solution are x=-2 and x=4
see the attached figure
therefore
The number can be -2 or 4
Answer: 130 meters
Step-by-step explanation:
We have to let the "surface of the ocean" be at 0 height.
So,
anything above surface has POSITIVE height
and anything below surface has NEGATIVE height
The albatross is 100 m above, so we can say its height is:
+100 meters
The shark is 30 m below, so we can say its height is:
-30 meters
The difference in height is thus:
100 - (-30) = 100 + 30 = 130 meters
