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2 years ago

Bailey & Riley sell magazines.

Mathematics

1 answer:

Solnce55 [7]2 years ago

8 0

Answer:

Step-by-step explanation:

We can write Bailey's equation as:

29 + 1.50x

and Riley's equation as:

20 + 2x

Where

x is the number of magazines sold

Since Riley sold 12, her total pay for that day would be:

20 + 2x

20 + 2(12)

20 + 24

$44

Now, how many magazines Bailey need to sell? We equate Bailey's equation to 44 and find x:

29 + 1.5x = 44

1.5x = 44 - 29

1.5x = 15

x = 15/1.5

x = 10

hence, Bailey need to sell 10 magazines to make same money as Riley

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The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past

galina1969 [7]

Complete Question

The complete question is shown on the uploaded image

Answer:

1 ) The correct option B

2) The correct option is C

3) The correct option is C

4) The correct option is C

Step-by-step explanation:

From the question we are told that

The proportion that own a cell phone is $p = 0.90$

The sample size is n = 15

Generally the appropriate distribution for X is mathematically represented as

$X \ is \ B( n , p )$

$X \ is \ B( 15 , 0.90 )$

Generally the number students that own a cell phone in a simple random sample of 15 students is mathematically represented as

$\mu = n * p$

$\mu = 15 * 0.90$

$\mu = 13.5$

Generally the standard deviation of the number of students who own a cell phone in a simple random sample of 15 students is mathematically represented as

$\sigma = \sqrt{ n * p * q }$

Where q is mathematically evaluated as

$q = 1- p$

$q = 1- 0.90$

$q = 0.10$

$\sigma = \sqrt{ 15 * 0.90 * 0.10 }$

$\sigma = 1.16$

Generally the probability that all students in a simple random sample of 15 students own a cell phone is mathematically represented as

$P(X = 15) = \left 15} \atop {}} \right.C_{15} * p^{15} * q^{15 - 15}$

$P(X = 15) = \left 15} \atop {}} \right.C_{15} * (0.90)^{15} * (0.10 )^{15 - 15}$

From the combination calculator is $\left 15} \atop {}} \right.C_{15} = 1$

$P(X = 15) = 1 * 0.205891 * 1$

$P(X = 15) = 0.206$

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2 years ago

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oksian1 [2.3K]

Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

Nehal is a real estate developer, and he is designing a new neighborhood. The neighborhood will have four streets, each of which

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Answer:

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Step-by-step explanation:

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I have a question that says " jada has read 3/5 of a book. She has read 75 pages so far. How many pages are in the whole book?"

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Answer and Step-by-step explanation:

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