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3 years ago

Can someone plz help me out! With this problem I really need help ASAP! I will mark you as brainiest! Help help ASAP!

Mathematics

1 answer:

yarga [219]3 years ago

5 0

Answer:

John = 82 Billy = 82 Gregg = 80 Bob = 55

Step-by-step explanation:

John = (3x38)+(2x0)-(2x8)-(2x8)

Billy = (3x30)+(2x4)-(2x3)-(2x5)

Gregg = (3x30)+(2x3)-(2x4)-(2x4)

Bob = (3x25)+(2x6)-(2x9)-(2x7)

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qaws [65]

2x +2 when x = 4 = 10 -1 = 9?

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3 years ago

Remy recorded the favorite sport of students at his school. He surveyed 500 students. How many students chose Baseball?

disa [49]

Answer: 75 students

Step-by-step explanation:

15% of 500= 75

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3 years ago

From 22 potential women jurors and 25 potential men jurors, a jury of 12 is chosen at random. Let X be the number of women selec

Ne4ueva [31]

Answer:

The probability mass function is:

$P(X = x) = h(x,47,12,22) = \frac{C_{22,x}*C_{25,12-x}}{C_{47,12}}$

Step-by-step explanation:

The people are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability mass of the hypergeometric probability distribution is given by:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

In this question:

22 + 25 = 47 jurors, so $N = 47$

22 are women, which means that $k = 22$

Jury of 12, which means that $n = 12$ .

Thus

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = x) = h(x,47,12,22) = \frac{C_{22,x}*C_{25,12-x}}{C_{47,12}}$

Which is the probability mass function.

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3 years ago

Three times the sum of x and seven is greater than it equal to the sum of two x and six

Mariulka [41]

<h3>The value of x is greater than or equal to the value -15.</h3>

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Distributive property.

3x + 21 ≥ 2x + 6

Subtract 2x from both sides.

x + 21 ≥ 6

Subtract 21 from both sides.

x ≥ -15

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4 years ago

Divide X³ + 3x²−4x −12 by x +3. Choose any method

Lina20 [59]

Answer:

${x}^{2} (x + 3) - 4(x + 3) divided by x + 3$

Second step

$(x {}^{2} - 4)(x + 3) \div (x + 3)$

The (x+3) brackets cancel each other

Final answer is

$x {}^{2} - 4$

3 0

4 years ago