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coldgirl [10]
2 years ago
8

Solve 1/2x−5=10−3/4x . Check your solution. x=___

Mathematics
2 answers:
IrinaVladis [17]2 years ago
7 0

Answer

The answer is 12 for sure

Step-by-step explanation:

i just solved it like any other equation

1 i added 3/4 on both sides

2 then i added 5 on both sides

3 after you equation should look like 1 1/4x = 15

4 then i divided and it should be x = 12

pls mark brainliest

dem82 [27]2 years ago
5 0
X= 12


Please let me know if I need to explain it
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Answer:

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Step-by-step explanation:

We have the standard deviation for the sample. So we use the t-distribution to solve this question.

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Now, we have to find a value of T, which is found looking at the t table, with 44 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0141

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The lower end of the interval is the sample mean subtracted by M. So it is 390.47 - 343.40 = 47.07 units per month

The upper end of the interval is the sample mean added to M. So it is 390.47 + 343.40 = 733.87 units per month

The 95% confidence interval for the average monthly electricity consumed units is between 47.07 and 733.87

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