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olga_2 [115]
2 years ago
8

The tar contents of 8 brands of cigarettes selected at random from the latest list released by the federal Trade Commission is a

s follows: 7.3, 8.6, 10.4, 16.1, 12.2, 15.1, 14.5, and 9.3 milligrams. Calculate (
a. The mean;(
b. The variance.
Mathematics
1 answer:
sattari [20]2 years ago
3 0
The mean is 11.7 i don't know the Variance
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Solve the quadratic equation by completing the square.
Step2247 [10]

Answer:

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Step-by-step explanation:

To find the roots of a quadratic function we have to use the bhaskara formula

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x2 = (2 - √ (2^2 - 4 * 1 * (-13)))/2 * 1

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x2 = (2 - √ 56 ) / 2

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x2 = -2.74

6 0
3 years ago
X^2 + 3x - 4<br><br> please answer quickly! i will mark whoever answers first as brainliest &lt;3
vlabodo [156]

Answer:

(x-1) (x+4)

Step-by-step explanation:

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