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Svetlanka [38]
2 years ago
12

Plz solve this 2 question help​

Mathematics
1 answer:
makkiz [27]2 years ago
5 0

Answer:

sorry i cannot help you

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Lesley has $17 to spend, which she uses to buy a reference book. Write 2 points and solve an equation to show how much Lesley wi
Vikentia [17]

Answer:

LESLEY GETS ABSOLUTELY NOTHINGGGG

Step-by-step explanation:

6 0
2 years ago
The time needed for all college students to complete a certain paper-and-pencil maze follows a normal distribution with a popula
oee [108]

Answer:

The correct option is a

Step-by-step explanation:

From the question we are told that

   The population mean is  \mu = 30\ seconds

    The standard deviation is  \sigma = 3 \ seconds

     The sample size is  n  = 9

    The null hypothesis is H_o: \mu  = 30

     The alternative hypothesis is  H_a  :  \mu \ne 30

    The level of significance is  \alpha = 0.01

    The sample mean is  \= x = 31.2

Generally the test statistics is mathematically represented as

      z = \frac{ \= x - \mu }{ \frac{\sigma}{\sqrt{n} } }

=>   z = \frac{ 31.2 - 30}{ \frac{3}{\sqrt{9} } }

=>   z = 1.2

From the z table  the area under the normal curve to the right corresponding to  1.2  is    

         P(Z >  1.2) =  0.11507

Generally the p-value is mathematically represented as

         p-value = 2 * P(Z >  1.2)

=>       p-value = 2 *0.11507

=>       p-value = 0.230

From the value obtained w can see that

         p-value  > \alpha hence

The decision rule is  

Fail to reject the null hypothesis

The conclusion is there is not enough evidence to support the claim

6 0
3 years ago
Explain how you could use 25% of a number to find the number
Alex17521 [72]

Answer:

Step-by-step explanation: 25 percent​ means ​one fourth​. To calculate 25 percent of a number, simply divide it by 4. For example, 25 percent of 12 is 12 divided by 4, or 3. ​10 percent​ means ​one tenth​.

4 0
3 years ago
What is 15/8 in mixed number form
Eva8 [605]
1 7/8 because 15/8 =1 7/8

-JennaClaire
5 0
3 years ago
Read 2 more answers
You need a 35% solution. You are going to mix 15 liters of a 27% solution with an amount of a 50% solution. How much of the 50%
Galina-37 [17]

0.35 (15+x) = 0.27(15) + 0.5x

X = 8 liters

8 0
3 years ago
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