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Lesechka [4]
2 years ago
9

Plz solve the problem.

Mathematics
2 answers:
ehidna [41]2 years ago
7 0

Answer:

x = 7

Step-by-step explanation:

adell [148]2 years ago
3 0
Answer:
If this is what your looking for, the answer may be:
x=7
Hope this helps!
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What is the mean median range mode for 31 28 30 31?
Talja [164]
Mean is 30,median is 30.5,mode is 31.
5 0
2 years ago
Read 2 more answers
I forgot how to do this!! i'd like help please!!
user100 [1]

Answer:

9) 28

10) 22

Step-by-step explanation:

collinear means on the same line

9 ) AB+BC=AC

    16+12=28

10) 13+9=22

3 0
2 years ago
How much more money will i need to get to 50 if i have 20​
vaieri [72.5K]

Answer:

2 plus 3 equals 5 and add the zeros and you have 50

5 0
2 years ago
In one area, monthly incomes of technology-related workers have a standard deviation of $650. It is believed that the standard d
Virty [35]

Answer:

There is sufficient statistical evidence to prove that the standard deviation of the technology-related workers and the standard deviation of the non-technology workers are equal.

Step-by-step explanation:

Here we have our null hypothesis as H₀: σ² = s²

Our alternative hypothesis is then Hₐ: σ² ≠ s²

We therefore have a two tailed test

To test the hypothesis of difference in standard deviation which is the Chi squared test given as follows

\chi ^{2} = \dfrac{\left (n-1  \right )s^{2}}{\sigma ^{2}}

Where:

n = Size of sample

s² = Variance of sample = 950²

σ² = Variance of population = 650²

Degrees of freedom = n - 1 = 71 - 1 = 70

α = Significance level = 0.1

Therefore, we use 1 - 0.1 = 0.9

From the Chi-square table, we have the critical value as

1 - α/2 = 51.739,  

α/2 = 90.531

Plugging the values in the above Chi squared test equation, we have;

\chi ^{2} = \dfrac{\left (23-1  \right )950^{2}}{650 ^{2}} = 49.994

Therefore, since the test value within the critical region, we do not reject the null hypothesis, hence there is sufficient statistical evidence to prove that the standard deviation of the technology-related workers and the standard deviation of the non-technology workers are equal.

6 0
2 years ago
11. Delila is multiplying three negative numbers and determines that the solution will be negative. Is she correct or incorrect?
Gre4nikov [31]

Answer: CORRECT

Step-by-step explanation: Because any negative number will be positive when multiplied together but since there are 3 negative number the 3rd negative will always negate the positive so therefore Delila is correct

8 0
2 years ago
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