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3 years ago

I need help ... please help

Mathematics

1 answer:

kiruha [24]3 years ago

7 0

Answer:

the answer would be 35

Step-by-step explanation:

when u go up, you go up by 35 and run 1. therefore the answer is 35

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A data set has a mean of 150 and standard deviation of 13. The unusual values are those that are less than

zhuklara [117]

Using z-scores, it is found that the unusual values are those that are less than 124.

---------------------------

The z-score of a measure X in a data-set with mean $\mu$ and standard deviation $\sigma$ is given by:

$Z = \frac{X - \mu}{\sigma}$

The z-score measures how many standard deviations X is from the mean.
Measures that are<u> more than 2 standard deviations from the mean</u> are unusual.
Z < -2 means that the measure X is unusually low.
Z > 2 means that the measure X is unusually high.

In this problem:

Mean of 150, thus $\mu = 150$ .
Standard deviation of 13, thus $\sigma = 13$ .

$Z = \frac{X - \mu}{\sigma}$

$-2 = \frac{X - 150}{13}$

$X - 150 = -2(13)$

$X = 124$

Unusual values are those that are less than 124.

A similar problem is given at brainly.com/question/15315313

6 0

3 years ago

PLEASE HELP ME !

mart [117]

The mixed number would be 4 1/3, this is because of the 5 trays of brownies, 4 entire ones were sold which means only a fraction of the 5 one was sold. (4 out of 12) 4/12 could be simplified by dividing the top and bottom with 4 which leaves us with 4 1/3

4 0

3 years ago

In the figure above, point O is the center of the circle,

snow_tiger [21]

Answer:

16.67 or 16 2/3

Step-by-step explanation:

so, as BC is a tangent, it means the angle OBC is 90 degrees.

therefore, the angle BOC is 180 - 90 - 30 = 60 degrees.

that means the angle AOB is 180 - 60 = 120 degrees.

the triangle ABO must be an isosceles triangle, as the sides are both the radius of the circle. so, both remaining angles are the same : half of 180 - 120 = 60 = 30 degrees.

and so, we know that ABC is an isosceles triangle, because both "side angles" are equal = 30 degrees.

so, AB = BC.

and we know the circumference of the circle (50) and can calculate the radius

50 = 2×pi×r

25 = pi×r

r = 25/pi ≈ 7.96

now we have multiple ways to calculate AB.

AB = BC = tan(60) × r

AB = sqrt(r² + r² - 2×r×r×cos(120))

or ...

the first one might be easiest.

AB = tan(60) × 7.96 ≈ 13.78

oh, I just recognized, we need the arc AB (not the straight line).

even easier.

50 is the full "arc" of the circle for all 360 degrees.

but we only need the part of the angle AOB = 120 degrees.

so, this is then only the 120/360 part of the full circle circumference.

ABarc = 50 × 120/360 = 50 / 3 ≈ 16.67 or 16 2/3

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3 years ago

A paper hat is folded into the shape of a kite, as shown. What total length of ribbon is needed to line the two long sides of th

Phantasy [73]

The answer is . (22in)

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3 years ago

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Find the value of a that makes the statement true. <br> 3^-1/3^4=3^a

Snezhnost [94]

_
A= -1.3
negative 1. repeating 3.

HOPE I HELPED! :)

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4 years ago

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