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3 years ago

(2x+8)(5x-7) A.36x-56 B.10x^2-56 C.10x^2+26x-56 D.10x^2+54x+56

Mathematics

2 answers:

stich3 [128]3 years ago

6 0

so the right answer is of option C.

Hope this will help u...

valentinak56 [21]3 years ago

3 0

Answer:

The answer is:

10x^2+26x-56

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I think this is right.. I tried my best. If u get it sorry... I’m very sorry

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2 years ago

Twelve percent of U.S. residents are in their forties. Consider a group of nine U.S. residents selected at random. Find the prob

miskamm [114]

Answer:

The probability is 28 % ( approx )

Step-by-step explanation:

Since, there are only two possible outcomes in every trails ( residents are in their forties or not ),

So, this is a binomial distribution,

Binomial distribution formula,

Probability of success in x trials,

$P(x)=^nC_x p^x q^{n-x}$

Where, $^nC_x=\frac{n!}{x!(n-x)!}$

p and q are probability of success and failure respectively and n is the total number of trials.

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Hence, the probability that two or three of the people in the group are in their forties = P(X=2) + P(X=3)

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3 years ago

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Oksana_A [137]

Answer:

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Step-by-step explanation:

If the order does not matter, the number of possible different selections is determined as the combination of choosing four numbers out of 50:

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3 years ago