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LekaFEV [45]
3 years ago
10

Evaluate (−25)(38)/(−34).

Mathematics
1 answer:
muminat3 years ago
8 0
Multiply 25 and 38, the divide that by 34. 
the negatives will cancel because there is 1 on the top and 1 on the bottom.
i got 27.9412
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see explanation

Step-by-step explanation:

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X (5, - 1 ) → X' (- 5, - 1 )

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Solve two sevenths plus seven fourteenths (2 points)
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2 years ago
Suppose you pick two cards from a deck of 52 playing cards. What is the probability that they are both queens?
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Answer:

0.45% probability that they are both queens.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes

The combinations formula is important in this problem:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

Desired outcomes

You want 2 queens. Four cards are queens. I am going to call then A,B,C,D. A and B is the same outcome as B and A. That is, the order is not important, so this is why we use the combinations formula.

The number of desired outcomes is a combinations of 2 cards from a set of 4(queens). So

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Total outcomes

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0.45% probability that they are both queens.

4 0
3 years ago
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