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FinnZ [79.3K]
3 years ago
5

Twenty different statistics students are randomly selected. for each of​ them, their body temperature ​( degrees °​c) is measure

d and their head circumference​ (cm) is measured. if it is found that r=​0, does that indicate that there is no association between these two​ variables?
Mathematics
1 answer:
Trava [24]3 years ago
8 0
Yes, it does.

An r-value, or correlation coefficient, goes from -1 to positive 1.  -1 indicates a perfect decreasing match and 1 indicates a perfect increasing match.  0 indicates no relationship between the variables.
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Which statement shows how two polynomials 4x2 and x2 + 3x + 7 demonstrate the closure property when multiplied?
son4ous [18]
By definition we have to:
 A set has under an operation if performance of that operation on set members always produces a member of the same set; in this case we also say that the set is closed under the operation.
 For this case we have the following polynomials:
 4x ^ 2

x ^ 2 + 3x + 7
 Multiplying we have:
 (4x ^ 2) (x ^ 2 + 3x + 7) = 4x ^ 4 + 12x ^ 3 + 28x ^ 2

 The product of two polynomials is also a polynomial.
 Answer:
 
d 4x ^ 4 + 12x ^ 3 + 28x ^ 2 is a polynomial
4 0
3 years ago
Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).
Anna [14]
The shaded areas add to 2/5 of the area of the circle, which is given by
  A = πr²

Then the shaded area is ...
  (2/5)A = (2/5)π(10 in)²
  shaded area = 40π in²

7 0
3 years ago
Find the root(s) of f (x) = (x + 5)3(x - 9)2(x + 1). -5 with multiplicity 3 5 with multiplicity 3 -9
faust18 [17]

Answer:

  -5, multiplicity 3; +9, multiplicity 2; -1

Step-by-step explanation:

The roots of f(x) are those values of x that make the factors be zero. For a factor of x-a, the root is x=a, because a-a=0. If the factor appears n times, then the root has multiplicity n.

f(x) = (x+5)^3(x-9)^2(x+1) has roots ...

  • -5 with multiplicity 3
  • +9 with multiplicity 2
  • -1
4 0
2 years ago
If x = -6 wich inequality is true​
mart [117]

Answer:

where's the answer choices???

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Subtract.<br> 5x – 6x+2<br> - 1-2x - x - 2)
adell [148]

Answer:

7x^2 -5x + 4

Step-by-step explanation:

5x^2 – 6x+2

- (-2x^2 - x - 2)

We got 5x^2 - (-2x^2) = 5x^2 + 2x^2 = 7x^2

-6x - (-x) = -6x + x = -5x

2 - (-2) = 2+2 = 4

So the equation would be 7x^2 -5x + 4

Hope this help :3

3 0
3 years ago
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