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iVinArrow [24]
3 years ago
9

a) Does the Range Rule of Thumb estimate more often underestimate or overestimate the actual standard deviation?

Mathematics
1 answer:
qwelly [4]3 years ago
8 0
Yes it dose hope this helped :)
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The second derivative of acos(kx) ​
Shkiper50 [21]
F’(x)= -akxsinkx

F’’(x)= -a(kx)^2coskx

I’m really sorry if the answer turned out wrong but I tried my best!
8 0
2 years ago
Find a number which in which added square<br>sum will be 72.​
Tom [10]

Answer:

8.48528137424^2

Step-by-step explanation:

8.48528137424x8.48528137424

= 72

7 0
3 years ago
How many solutions are there to this equation 3x(x-4)+5-x=2x-7
stich3 [128]

Answer:

  2 solutions

Step-by-step explanation:

I like to use a graphing calculator to find solutions for equations like these. The two solutions are ...

  • x = 1
  • x = 4

__

To solve this algebraically, it is convenient to subtract 2x-7 from both sides of the equation:

  3x(x -4) +5 -x -(2x -7) = 0

  3x^2 -12x +5 -x -2x +7 = 0 . . . . . eliminate parentheses

  3x^2 -15x +12 = 0 . . . . . . . . . . . . collect terms

  3(x -1)(x -4) = 0 . . . . . . . . . . . . . . . factor

The values of x that make these factors zero are x=1 and x=4. These are the solutions to the equation. There are two solutions.

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<em>Alternate method</em>

Once you get to the quadratic form, you can find the number of solutions without actually finding the solutions. The discriminant is ...

  d = b^2 -4ac . . . . where a, b, c are the coefficients in the form ax^2+bx+c

  d = (-15)^2 -4(3)(12) = 225 -144 = 81

This positive value means the equation has 2 real solutions.

4 0
2 years ago
What is 44 as a percentage of primes
Sholpan [36]
44 = 2^2 x 11
11+2= 13


13
-----
44                  = <span>0.29545454545</span>
4 0
3 years ago
SOMBODY PLZ HELP!!!! I WILL GIVE BRAINLIST
trapecia [35]
P is dependent and 2b is independent
7 0
3 years ago
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