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zvonat [6]
3 years ago
5

Pls help meh i will give brainlyest

Mathematics
2 answers:
g100num [7]3 years ago
6 0

Answer:

75

Step-by-step explanation:

Use order of operations to solve this.

P - Parenthesis

E - Exponents

M - Multiplication

D - Division

A - Addition

S - Subtraction.

First, do 20 x 4.

80 - 100 / 20

Then, divide 100/20.

80 - 5

= 75

MissTica3 years ago
5 0

Answer:

The answer is 75

can me be brainliest?

Step-by-step explanation:

PEMDAS

20x4-100/20

80-5

75

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The USDA conducted tests for salmonella in produce grown in California. In an independent sample of 252 cultures obtained from w
Marat540 [252]

Answer:

 The decision rule is  

Fail to reject the null hypothesis

  The conclusion is  

There no sufficient evidence to show that the proportion of salmonella in the region’s water differs from the proportion of salmonella in the region’s wildlife

Step-by-step explanation:

From the question we are told that

   The first  sample size is n_1   =  252

    The number that tested positive is  k_1  =  18

     The second sample size is  n_2   =  476

     The number that  tested positive is  k_2 =  20

     The level of significance is  \alpha  = 0.01

Generally the first sample proportion is mathematically represented as

      \^ p _1 =  \frac{k_1 }{ n_1 }

=>    \^ p _1 =  \frac{18 }{ 252 }

=>    \^ p _1 = 0.071

Generally the second sample proportion is mathematically represented as

      \^ p _2 =  \frac{k_2 }{ n_2 }

=>    \^ p _2 =  \frac{20 }{ 476}

=>    \^ p _2 = 0.042

The  null hypothesis is            H_o  :  p_1 - p_2 = 0

The alternative hypothesis is  H_a :  p_1 - p_2 \ne 0

Generally the test statistics is mathematically represented

       z =  \frac{ \^ p_1 - \^ p_2  -  ( p_ 1 - p_2 )}{ \sqrt{\frac{\^ p_1 (1-\^ p_1)}{ n_1  } + \frac{\^ p_2 (1-\^ p_2)}{ n_2  }  } }

=>    z =  \frac{ 0.071 - 0.042  - 0 }{ \sqrt{\frac{0.071  (1-0.071)}{  252  } + \frac{0.042 (1-\^ 0.042)}{ 476  }  } }

=>    z =  1.56

From the z table  the area under the normal curve to the right corresponding to  1.56   is  

        P(Z >  1.56 ) =0.05938

Generally the p-value is mathematically represented as

         p-value =  2 * P(Z >  1.56 )

=>      p-value = 2 *  0.05938

=>      p-value = 0.1188

From the value obtained we see that   p-value  >  \alpha hence

  The decision rule is  

Fail to reject the null hypothesis

  The conclusion is  

There no sufficient evidence to show that the proportion of salmonella in the region’s water differs from the proportion of salmonella in the region’s wildlife

 

5 0
3 years ago
Encuentra las medidas que faltan
tia_tia [17]

Answer:

x=49

Step-by-step explanation:

los 3 angulos del triangulo deben de sumar 180

76+55=131

180-131=49

76+55+49=180

8 0
2 years ago
Read 2 more answers
Determine if the given set is a subspace of set of prime numbers P 2. Justify your answer. The set of all polynomials of the for
devlian [24]

Answer:

All polynomials of the p=at² where a is in R is a subspace Pn for an appropriate value of n do not fulfill the condition and hence do not form the subspace

Step-by-step explanation:

Check attachment

7 0
3 years ago
If 15 times a number to equal 647
Ainat [17]
I'm assuming, from what you've given me that the question is asking to do this.

15n=647
647 divided by 15 equals 43.13...repeated
Let me know if this is what you are looking for.

3 0
3 years ago
5 7/8 - 11/4 equals what (show work please)
nordsb [41]
25/8 when using the butterfly method
7 0
3 years ago
Read 2 more answers
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