3 years ago

How to do HCF and LCM

1 answer:

7 0

To find the GCF, list the prime factors of each number, then multiply the factors that both number have in common. To find the LCD, find the smallest possible integer divisible by both numbers.

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olya-2409 [2.1K]

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3 years ago

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A random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation

Dennis_Churaev [7]

Answer: 95% confidence interval would be (1341.2,1458.8).

Step-by-step explanation:

Since we have given that

n = 64

Average = 1400

Standard deviation = 240

We need to find the 95% confidence interval for SAT scores.

So, z = 1.96

So, Interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=1400\pm 1.96\times \dfrac{240}{\sqrt{64}}\\\\=1400\pm 1.96\times \dfrac{240}{8}\\\\=1400\pm 1.96\times 30\\\\=1400\pm 58.8\\\\=(1400-58.8,1400+58.8)\\\\=(1341.2,1458.8)$

Hence, 95% confidence interval would be (1341.2,1458.8).

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3 years ago

Which of the following best describes the algebraic expression 7(x-9)+14?

slavikrds [6]

The answer is (A) because the (quantity of a number minus nine) implies that x-9 is inside parenthesis.

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3 years ago

On a coordinate plane, line A has a negative slope, line b is horizontal, line c is vertical, and line d has a positive slope.

Digiron [165]

Answer:

Step-by-step explanation:

It cannot be line a or line d because the line will have a constant rate of change. It cannot be line c because line c would be undifined. Therefore, it must be line b.

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3 years ago

2. Which expression is equivalent to 3ly-6)?

Alchen [17]

Answer:

pyfoydoye9ye9ye9ts8ts9teo5e

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2 years ago