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9966 [12]
3 years ago
15

If the difference (3x ^ 2 - 2x + 5) - (x ^ 2 + 3x - 2) is multiplied by 3x ^ 2 , what is the result, written in standard form?

Mathematics
1 answer:
galina1969 [7]3 years ago
4 0
Answer: 6x^4 - 15x^3 + 27x^2

Combine like terms. Then multiply the result by 3x^2

Work:

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3 years ago
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What are the coordinates of A'?
alexandr402 [8]

Answer:

(6,-2)

Step-by-step explanation:

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3 0
3 years ago
Scores on the GRE are normally distributed with a mean of 514 and a standard deviation of 92. Use the 68-95-99.7 rule to find th
SpyIntel [72]

Answer:

2.5%

Step-by-step explanation:

The percentage of people taking the test who are above 698 is ___%

Empirical rule formula states:

95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

99.7% of data falls within 3 standard deviations from the mean - between μ - 3σ and μ + 3σ

From the question, we have:

Mean of 514 and a Standard deviation of 92

Hence:

μ ± xσ

514 ± 92x = 698

514 + 92x = 698

92x = 698 - 514

92x = 184

x = 184/92

x = 2

Hence, the data is correct and it is 2 standard deviation from the mean. Therefore, 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

The question is asking us to find the percentage of people taking the test who are above 698 is calculated as:

100 - 95% /2

= 5/2

= 2.5%

The percentage of people taking the test who are above 698 is 2.5%

8 0
3 years ago
7 x 45 = 7 x 3 x ? What should replace the ? In the number sentence
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4 years ago
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