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pantera1 [17]
3 years ago
6

If you put 25ml into a glass how much water is needed

Mathematics
1 answer:
dlinn [17]3 years ago
6 0

Answer: it is depends on what unit of measurement your look looking for

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How many solutions does 5-2x=4-2x+4+x
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Answer:

one solution; the answer is -3 = x

Step-by-step explanation:

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3 years ago
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Independent random samples of vehicles traveling past a given point on an interstate highway have been observed on monday versus
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Hi! 

To compare this two sets of data, you need to use a t-student test:

You have the following data:

-Monday n1=16; <span>x̄1=59,4 mph; s1=3,7 mph

-Wednesday n2=20;  </span>x̄2=56,3 mph; s2=4,4 mph

You need to calculate the statistical t, and compare it with the value from tables. If the value you obtained is bigger than the tabulated one, there is a statistically significant difference between the two samples.

t= \frac{X1-X2}{ \sqrt{ \frac{(n1-1)* s1^{2}+(n2-1)* s2^{2} }{n1+n2-2}} * \sqrt{ \frac{1}{n1}+ \frac{1}{n2}} } =2,2510

To calculate the degrees of freedom you need to use the following equation:

df= \frac{ (\frac{ s1^{2}}{n1} + \frac{ s2^{2}}{n2})^{2}}{ \frac{(s1^{2}/n1)^{2}}{n1-1}+ \frac{(s2^{2}/n2)^{2}}{n2-1}}=33,89≈34

The tabulated value at 0,05 level (using two-tails, as the distribution is normal) is 2,03. https://www.danielsoper.com/statcalc/calculator.aspx?id=10

So, as the calculated value is higher than the critical tabulated one, we can conclude that the average speed for all vehicles was higher on Monday than on Wednesday.



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3 years ago
Seraphina picked 120 strawberries in six hours. At this rate, how many strawberries did Seraphina pick in 4 hours?
Lyrx [107]

Answer:

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Step-by-step explanation:

If she picked 120 strawberries in 6 hours

Then in 1hour she picked 120/6 = 20 strawberries

Then in 4 hours she picked 20×4 = 80 strawberries

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The answer is x= 3,8
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