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ratelena [41]
3 years ago
13

I don’t know what to do

Mathematics
1 answer:
Gre4nikov [31]3 years ago
6 0

Answer:

is it on a website or paper?

Step-by-step explanation:

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you make a salad and share with friends your sister eats 1/3 of it before they arrive (it is a a and b question pls help)
bagirrra123 [75]

Answer:

Sister Is a PIG

Step-by-step explanation:

and Your Friends Gets her Scraps

3 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}

Z=3

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
What is the measurement of angle B
Liono4ka [1.6K]
Angles B and D are congruent so:

(360-112-74)/2=87°
6 0
3 years ago
Read 2 more answers
For the data in the table x|y 3|6 6|18 8|24, does y vary directly with x? write and equation for the direct variation. a. yes;y=
madam [21]
Hi,

Try B, yes; y=3x

I hope I helped :)


8 0
3 years ago
What is the measure of ∠x
julsineya [31]

Answer90 degrees

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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