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miguearrobita
17.04.2022 •
Mathematics
The sum of two numbers is 85. The second Number is four more than two times the first number. What are the two numbers?
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Ответ:
Step-by-step explanation:
x=first number; y=second number
x+y=85
y-4=2x
Solve-
y=85-x
(85-x)-4=2x
81=3x
x=27
Plug in-
(27)+y=85
y=58
Ответ:
98% Confidence interval: (0.5483,0.6891)
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 257
Number of adults total body length was 28 feet or longer, x = 159
98% Confidence interval:
Putting the values, we get:
is the required 98% confidence interval.