10-5(9n-9) simplify the expressions

1 answer:

eduard3 years ago

8 0

Answer:

−45n+55

Step-by-step explanation:

10-5(9n-9)

distribute -5 into (9n-9)

10-45n+45

combine like terms

10+45=55

-45n+55

hope this helps

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stich3 [128]

Using probability concepts, it is found that P(S and D) = 0.1275.

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A probability is the <u>number of desired outcomes divided by the number of desired outcomes</u>.
In a standard deck, there are 52 cards.
Of those, 13 are spades, and 13 are diamond.

The probability of selecting a spade with the first card is 13/52. Then, there is a 13/51 probability of selecting a diamond with the second. The same is valid for diamond then space, which means that the probability is multiplied by 2. Thus, the desired probability is:

$P(S \cap D) = 2 \times \frac{13}{52} \times \frac{13}{51} = \frac{2\times 13 \times 13}{52 \times 51} = 0.1275$