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3 years ago

Pls help plllllllssssssssssssssssssssssssssssss helpppppppppppppppppppppppp

Mathematics

1 answer:

hjlf3 years ago

5 0

Sorry don’t now the answer to this problem

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5. How many standard deviations from the mean is the weight of 190 people?

Gemiola [76]

Answer:

i think that the correct C

Step-by-step explanation:

3 0

3 years ago

Each pack cost 3. he spent a total of 18 on gum. how many packs of gum did he buy.

TEA [102]

Answer:

So to figure that out you would take the money that he spend which was 18, each pack of gum cost 3, so to figure out the question you would simply divide 18 by 3 which would give you 6.

so how would you check that answer you could take 6 and multiple by the cost of each pack which would give you 18.

so answer is 6.

Step-by-step explanation:

18/3

7 0

3 years ago

The ratio of boys to girls in a class is 3:5. There are 32 students in the class. How many more girls than boys are there?

Mandarinka [93]

Answer:

There are 8 more girls

Step-by-step explanation:

If you divide 32 by 8 (since the ratio is 3:5 which is 8 parts (3+5)). You get 4.

Thus, there are 12 boys and 20 because 3*4 is 12 and 5*4 is 20. 12+20 is 32.

6 0

3 years ago

Dean Halverson recently read that full-time college students study 20 hours each week. She decides to do a study at her universi

romanna [79]

Answer: The p-value is 0.154.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis :

$H_0:\mu=20$

Alternate hypothesis :

$H_1:\mu$

Population mean = 20 hours

Sample mean = 18.5 hours

Sample standard deviation = 4.3 hours

Sample size n = 35

So, test statistic would be

$z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{18.5-20}{\dfrac{4.3}{\sqrt{35}}}\\\\z=\dfrac{-1.5}{0.726}\\\\z=-2.066$

So, the p value would be 0.154.

Hence, the p-value is 0.154.

4 0

3 years ago

Show that 4/9 - 1/6 = 5/18

ludmilkaskok [199]

Answer:

Step-by-step explanation:

4/9-1/6=5/18

5 0

3 years ago

Read 2 more answers