The sum of two numbers is 27. One number is 2 times as large as the other. What are the numbers?
2 answers:
Answer: <em>Please note the number of the order may differ.</em>
= 18
= 9
Step-by-step explanation:
We will write mathematical equations to represent the situation. Let be the first number and
be the second.
-> The sum of two numbers is 27.
+
= 27
-> One number is 2 times as large as the other.
= 2 *
Now, we will solve it as a system of equations.
+
= 27
(2 * ) +
= 27
3 * = 27
= 9
-----------
= 2 *
= 2 * (9)
= 18
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The probability the 51st call arriaves within 150hours is 0.0431, the probability the next call arrives within the next 2 hours 0.5488, the probability the sum of these 50 numbers is less than 356 is 0.4165.
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- standard deviation = ?
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b)
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c)
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