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Tju [1.3M]
3 years ago
8

The numbers on two consecutively numbered gym lockers have a sum of 143. What are the locker numbers

Mathematics
2 answers:
PSYCHO15rus [73]3 years ago
8 0
A + a + 1 = 143

2a + 1 = 143

2a = 142

a = 71

b = 71 + 1

b = 72

check;

71 + 72 = 143

143 = 143

so your answer is 71 and 72. hope this helps, God bless! 
Romashka [77]3 years ago
8 0
143 divided by 2 = 71.5
71.5 - .5 = 71
.5 + .5 = 1
71 + 1 = 72
So the answer is 71 and 72
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The following data represent the pH of rain for a random sample of 12 rain dates in Tucker County, West Virginia. A normal proba
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Step-by-step explanation:

n = 12

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a) Point estimate = sample mean = 4.8925

Confidence interval is written in the form,

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Margin of error = z × s/√n

Where

From the information given, the population standard deviation is unknown and the sample size is small, hence, we would use the t distribution to find the z score

In order to use the t distribution, we would determine the degree of freedom, df for the sample.

df = n - 1 = 12 - 1 = 11

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Looking at the t distribution table,

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We are 95% confident that the population mean of the rain water ph lies between 4.6955 and 5.0895

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