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Fantom [35]
2 years ago
7

Someone help me! PLS DONT SKIP

Mathematics
2 answers:
monitta2 years ago
7 0

Answer:

The answer choice you should pick is n = 1/5.

ddd [48]2 years ago
6 0

Answer:

n= 1/5

Step-by-step explanation:

multiply 5 by everything in parenthesis

5n-1\2=1/2

add 1/2

5n=1

divide

n=1/5

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An engineer wants to know if the average amount of energy used in his factory per day has changed since last year. The factory u
m_a_m_a [10]

Answer:

<em> The calculated value Z = 1.8823 <1.96 at 0.05 level of significance</em>

<em> The average amount of energy used in his factory per day has changed since last year.          </em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that mean of the Population = 2000 (MWH)

Given that size of the sample 'n' = 400

Given that mean of sample x⁻ = 2040 MWH

Given that the standard deviation = 425 MWH per day

<u><em>Step(ii):-</em></u>

<u><em>Null hypothesis:H₀: μ = 2000 (MWH)</em></u>

<u><em>Alternative Hypothesis:H₁: μ≠ 2000( MWH)</em></u>

<em>Test statistic</em>

<em>                  </em>Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }<em></em>

<em>                 </em>Z = \frac{2040-2000}{\frac{425}{\sqrt{400} } }<em></em>

<em>                Z =  1.8823</em>

<em>The calculated value Z = 1.8823 <1.96 at 0.05 level of significance</em>

<u><em>Final answer:</em></u><em>-</em>

<em> The calculated value Z = 1.8823 <1.96 at 0.05 level of significance</em>

<em> The average amount of energy used in his factory per day has changed since last year.          </em>

3 0
2 years ago
Will give brainliest if you get the right answer.
Alborosie
D i think sorry if its wronf
4 0
3 years ago
Read 2 more answers
The product of two numbers is 713. The first number is 9 more than the second number. Which equation can be used to find x, the
Art [367]
Let x = first number and y = second number.
The first statement is expressed as
x*y = 713
The second statement is expressed as
x = y + 9
To find x, use the second equation in terms of y, that is y = x - 9. Then substituting it to the first equation yields
x*(x - 9) = 713
7 0
3 years ago
Read 2 more answers
What is the slope of the line
Naily [24]

Step-by-step explanation:

(1, -3). (3, 0)

(0 + 3)/(3 - 1) = 3/2 is the slope

6 0
2 years ago
Find the equation of the line shown. <br>please I need it soon as possible​
Anna35 [415]

Answer:

Y=2x+0.5

Step-by-step explanation:

The gradient is 2/1=2x

The y-intercept looks to be around 0.5

5 0
3 years ago
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