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kompoz [17]
3 years ago
9

What is the interquartile range of the scores?

Mathematics
1 answer:
NeX [460]3 years ago
8 0

Answer:

Step-by-step explanation:

Step by step

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Help me out here pleaseee​
Nat2105 [25]

Answer:

Wednesday: 45 - 18

Thursday: 55 - 22

Step-by-step explanation:

18*2.5=45

55/5=11

11*2=22

7 0
3 years ago
Read 2 more answers
If f(x) = |(x2 − 9)(x2 + 1)|, how many numbers in the interval [−1, 1] satisfy the conclusion of the mean value theorem?
ivann1987 [24]

Answer:

only one number c=0 in the interval [-1,1]

Step-by-step explanation:

Given : Function f(x) = |(x^2-9)(x^2 + 1)|   in the interval [-1,1]

To find : How many numbers in the interval [−1, 1] satisfy the conclusion of the mean value theorem.

Mean value theorem : If f is a continuous function on the closed interval [a,b] and differentiable on the open interval (a,b), then there exists a point 'c' in (a,b) such that f'(c)=\frac{f(b)-f(a)}{b-a}

Solution : f(x) is a function that satisfies all of the following :

1) f(x)  is continuous on the closed interval [-1,1]  

\lim_{x\to a} f(x)=f(a)

2) f(x) is differentiable on the open interval  (-1,1)

Then there is a number  c such that  f'(c)=\frac{f(b)-f(a)}{b-a}

f(a)=f(-1) = |(-1^2-9)(-1^2 + 1)|=|(-8)(2)|=16

f(b)=f(1) = |(1^2-9)(1^2 + 1)|=|(8)(2)|=16

f'(c)=\frac{f(b)-f(a)}{b-a}=\frac{16-16}{2}=0

f'(c)=0 ........[1]

Now, we find f'(x)

f(x) = |(x^2-9)(x^2 + 1)|

f(x) =x^4-8x^2-9

Differentiating w.r.t  x

f'(x) =4x^3-16x

In place of x we put x=c

f'(c) =4c^3-16c

f'(c) =4c^3-16c=0  (by [1], f'(c)=0)

4c(c^2-4)=0

4c=0,c^2-4=0

either c=0 or  c^2-4=0\rightarrow c=\pm2

we cannot take c=\pm2  because they don't lie in the interval [-1,1]

Therefore, there is only one number c=0 which lie in interval [-1,1] and satisfying the conclusion of the mean value theorem.



3 0
3 years ago
The cost of 8 muffins and 2 quarts of milk is $18. The cost of 3 muffins and 1 quart of milke is $7.50. How much does 1 muffin a
Studentka2010 [4]
Let x equal the cost of one muffin and y equal the cost of quart of milk
8x+2y=18
3x+y=7.50

See if you can solve it from there. If not let me know
4 0
3 years ago
Read 2 more answers
2. -7 -4 heres another one
Gwar [14]

Answer:

-11

Step-by-step explanation:

Subtracting a positive number from is a negative number is basically just adding normally but after you are done you put a negative sign in front of the number.

<h2><u><em>Could I please have BRAINLIEST.</em></u></h2>
4 0
3 years ago
Nhi cna cn vccvjhvychjvhxan
Tanzania [10]

Answer:

jeusus eussbjajo disis

4 0
3 years ago
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