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olya-2409 [2.1K]
3 years ago
15

NEED HELP ASAP PLEASE!! WILL MARK BRAINLIEST AND STUFF

Mathematics
1 answer:
Georgia [21]3 years ago
7 0

1.)  y = 4/7x + 2

2.) y = -3/4x + 6

3.) y = 9/2x + 18

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The point R is halfway between the integers on the number line below and represents the number ____. (Use the hyphen for negativ
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-4.2

Step-by-step explanation:

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What is 10 times Six
olchik [2.2K]

10 • 6 = 60

10 + 10 + 10 + 10 + 10 + 10

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20 + 20 + 20

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40 + 20 = 60

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Determine the volume of a cube with sides of 30mm
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Answer: Hello, your answer would be 2.7x10^-5m^3

Step-by-step explanation:

30mm

a=0.03m

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2 years ago
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How do you convert a fraction to a decimal?​
Volgvan

Answer:

To convert fractions to decimals you just divide the top by the bottom — divide the numerator by the denominator — and if the division doesn’t come out evenly, you can stop after a certain number of decimal places and round off. To convert fractions to decimals: If the fraction is a mixed number, change it to an improper fraction.

7 0
3 years ago
A college-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100.
yawa3891 [41]

Answer:

The probability is  0.003

Step-by-step explanation:

We know that the average \mu is:

\mu=500

The standard deviation \sigma is:

\sigma=100

The Z-score is:

Z=\frac{x-\mu}{\sigma}

We seek to find

P(x800)

For P(x>800) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{800-500}{100}

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The score of Z = 3 means that 800 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x>800)=0.15\%

For P(x<200) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{200-500}{100}

Z=-3

The score of Z = -3 means that 200 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x

Therefore

P(x800)=P(x800)

P(x800)=0.0015 + 0.0015

P(x800)=0.003

6 0
3 years ago
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