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3 years ago

Whoever answers correctly gets brainliest

Mathematics

2 answers:

Alona [7]3 years ago

8 0

Answer: Choice 4

Step-by-step explanation:

6 was not multiplied by 3 because that would make it

un equivalent, opposite of what she's trying to do

Nimfa-mama [501]3 years ago

3 0

Answer
I think it’s 3
Explanation

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Juanita bought 6 lemons. she used 2/3 of them to make lemonade. how many lemons did she used?

ivanzaharov [21]

6 times 2/3 equal to 4
Juanita ues 4 lemons to make lemonade

4 0

3 years ago

Find the least common multiple of the following polynomials: 5y^2-80 and y+4

algol [13]

$5y^2 - 80 = 5(y^2-16) = 5(y - 4)(y + 4)$

LCM of 5(y - 4)(y + 4) and (y + 4) is 5(y - 4)(y + 4)

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Answer: 5(y - 4)(y + 4) (Answer D)
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3 0

3 years ago

Read 2 more answers

g An urn contains 150 white balls and 50 black balls. Four balls are drawn at random one at a time. Determine the probability th

xxTIMURxx [149]

Answer:

With replacement, 0.2109 = 21.09% probability that there are 2 black balls and 2 white balls in the sample.

Without replacement, 0.2116 = 21.16% probability that there are 2 black balls and 2 white balls in the sample.

Step-by-step explanation:

For sampling with replacement, we use the binomial distribution. Without replacement, we use the hypergeometric distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

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

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

And p is the probability of X happening.

Hypergeometric distribution:

The probability of x sucesses is given by the following formula:

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

In which:

x is the number of sucesses.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

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

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

Sampling with replacement:

I consider a success choosing a black ball, so $p = \frac{50}{150+50} = \frac{50}{200} = 0.25$

We want 2 black balls and 2 white, 2 + 2 = 4, so $n = 4$ , and we want P(X = 2).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 2) = C_{4,2}.(0.25)^{2}.(0.75)^{2} = 0.2109$

With replacement, 0.2109 = 21.09% probability that there are 2 black balls and 2 white balls in the sample.

Sampling without replacement:

150 + 50 = 200 total balls, so $N = 200$

Sample of 4, so $n = 4$

50 are black, so $k = 50$

We want P(X = 2).

$P(X = 2) = h(2,200,4,50) = \frac{C_{50,2}*C_{150,2}}{C_{200,4}} = 0.2116$

Without replacement, 0.2116 = 21.16% probability that there are 2 black balls and 2 white balls in the sample.

3 0

3 years ago

Martha is buying hot dogs and buns for the

pychu [463]

Answer:

6 packages of hot dogs

5 packages of buns

Step-by-step explanation:

The least common multiple of 10 and 12 is 60.

Divide 60 by the amount of product in each package to find the answers.

Hope this helps ^-^

5 0

4 years ago

Read 2 more answers

Which number line represents the solution set for the inequality 3(8-4x)<6(x-5)

quester [9]

Answer:

x>3

Step-by-step explanation:

3 0

2 years ago