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frez [133]
3 years ago
11

A class of 30 introductory statistics students took a quiz worth 100 points. the standard deviation of the scores was 0. what mu

st be true about the students' scores?
Mathematics
2 answers:
bearhunter [10]3 years ago
8 0
This means that everybody answered the same number of items. This means that every data value is equal to the mean. This outcome permits us to say that the sample standard deviation of a data set is zero if and only if all of its values are same or identical.
Sloan [31]3 years ago
4 0

The answer is that all the scores are the same

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Geometry help! Find part B
hram777 [196]

Answer: It looks like Part B is about 4 times that of part A.

Step-by-step explanation: I think the answer would be 12.

A would be 3. B would be 12.

I'm terribly sorry if it is wrong.

3 0
3 years ago
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Qn item is regularly priced at 35.00 Melissa bought it on sale for 95% off the regular price.
Travka [436]
35 x .95 = 33.25.  33.25 is how much off it was, so now you subtract that number by 35 and get 1.75. Melissa bought the item for $1.75 
5 0
4 years ago
If the function h is defined by h(x)=<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D" id="TexFormula1" title="x^{2}" alt="x^{2}" a
harkovskaia [24]

Given:

The function is:

h(x)=x^2-3x+5

To find:

The value of h(2x+1).

Solution:

We have,

h(x)=x^2-3x+5

Putting x=2x+1, we get

h(2x+1)=(2x+1)^2-3(2x+1)+5

h(2x+1)=(2x)^2+2(2x)(1)+(1)^2-3(2x)-3(1)+5

h(2x+1)=4x^2+4x+1-6x-3+5

On combining like terms, we get

h(2x+1)=4x^2+(4x-6x)+(1-3+5)

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Therefore, the required function is h(2x+1)=4x^2-2x+3.

3 0
3 years ago
Find the surface area​
Semmy [17]

Answer:

The surface area is 198.75\ ft^2

Step-by-step explanation:

<u>Step 1:  Determine the area of the bottom</u>

A = s^2

A = (7.5\ ft)^2

A = 56.25\ ft^2

<u>Step 2:  Determine the area of the triangles</u>

A = \frac{h * b}{2}

A = \frac{9.5\ ft * \frac{7.5\ ft}{2}}{2}

A=\frac{9.5\ ft*3.75\ ft}{2}

A = 17.8125\ ft^2

There are two of these right triangles on every side which means that we have 8 of these triangles so we multiply the area that we got by 8.

A = 17.8125\ ft^2 * 8

A=142.5\ ft^2

<u>Step 3:  Combine the area to get the surface area</u>

A_{total}=56.25\ ft^2+142.5\ ft^2

A_{total}=198.75\ ft^2

Answer: The surface area is 198.75\ ft^2

6 0
3 years ago
Which expression is equivalent to (−7x+8x+19y)−(6y+8−20x−16y)?
Kisachek [45]

Answer:

21x + 29y - 8

Step-by-step explanation:

(−7x+8x+19y)−(6y+8−20x−16y)

−7x+8x+19y−6y-8+20x+16y

(−7x+8x+20x)+(19y−6y+16y)-8

21x + 29y - 8

5 0
2 years ago
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