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ch4aika [34]
3 years ago
14

Write the following using algebraic notation using x as the unknown number:

Mathematics
1 answer:
andrew11 [14]3 years ago
3 0
2X-9 is this what you wanted
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A factory dumps an average of 2.43 tons of pollutants into a river every week. if the standard deviation is 0.88 tons, what is t
vovikov84 [41]
25.8%  
First, determine how many standard deviations from the norm that 3 tons are. So:
 (3 - 2.43) / 0.88 = 0.57/0.88 = 0.647727273  
So 3 tons would be 0.647727273 deviations from the norm. Now using a standard normal table, lookup the value 0.65 (the table I'm using has z-values to only 2 decimal places, so I rounded the z-value I got from 0.647727273 to 0.65). The value I got is 0.24215. Now this value is the probability of getting a value between the mean and the z-score. What I want is the probability of getting that z-score and anything higher. So subtract the value from 0.5, so 0.5 - 0.24215 = 0.25785 = 25.785%  
So the probability that more than 3 tons will be dumped in a week is 25.8%
5 0
3 years ago
According to data, as education level increases the unemployment rate decreases. This is an example of
Crank
I don’t think I just want points
5 0
2 years ago
I need help on this.
mote1985 [20]

Let's go:


7 = x

38 + x = 180

x = 180 - 38

x = 142°


7 = 142°


I hope I helped you



5 0
3 years ago
9.<br> What is the range of the function<br> f(x) = 3.3?
klemol [59]

Answer:

69

Step-by-step explanation:

6 0
3 years ago
What is the reciprocal of 6.5?
Mrrafil [7]
6.5 is equal to 65/10 the reciprocal of that is 10/65=2/13
7 0
3 years ago
Read 2 more answers
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