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astraxan [27]
2 years ago
8

2 [ 2 + 2 ( 8 ⋅ 6 − 17 ) ]

Mathematics
1 answer:
vaieri [72.5K]2 years ago
8 0

Answer: 128

Step-by-step explanation:

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What is the best answer to solution of x^2 + 16 = 0?​
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Answer:

4. C. x = 4 or -4

Step-by-step explanation:

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Helppppppppppppppppppppppppppppppppp
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2 years ago
Suppose the mean SAT verbal score is 525 with a standard deviation of 100, while the mean SAT math score is 575 with a standard
Ipatiy [6.2K]

Answer:

The mean of the combined math and verbal scores is 1100, while the standard deviation is 141.

Step-by-step explanation:

Normal variables

Normal variables have mean \mu and standard deviation \sigma

When we add normal variables, the combined mean is the sum of both means, and the standard deviation is the square root of the sum of both variances. The distribution is still normal.

In this question:

Verbal: \mu_{V} = 525, \sigma_{V} = 100.

Math: \mu_{M} = 575, \sigma_{M} = 100

Combined:

\mu = \mu_{V} + \mu_{M} = 525 + 575 = 1100

\sigma = \sqrt{\sigma_{V}^{2}+\sigma_{M}^{2}} = \sqrt{100^2 + 100^2} = 141

The mean of the combined math and verbal scores is 1100, while the standard deviation is 141.

6 0
3 years ago
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