1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ExtremeBDS [4]
3 years ago
14

What is the mean of -9,-5,-4,-4,-2,0,1,2,3,5

Mathematics
1 answer:
IrinaK [193]3 years ago
8 0

Answer: - 1.3

Step-by-step explanation: I believe that it's -1.3 if you're referring to the arithmetic mean.

(1) Take the sum of -9, -5, -4, -4, -2, 0, 1, 2, 3, 5 and simplify it to -13

(2) Count the number of terms in the data set.

{-9, -5, -4, -4, -2, 0, 1, 2, 3, 5}

{1, 2, 3, 4, 5, 6, 7, 8, 9, 10} - The number of terms in the data set is <u>10.</u>  

(3) Divide the sum by the number of terms and simplify.

-13 / 10 = -1.3 (simplified)

You might be interested in
How do you solve this problem?
jekas [21]
Very nice problem. You should look up the history of this question. It has a very long one having to do with mirrors made between 50 BC and 50 AD.

Step One
Find AB, BC, AC
Before beginning this problem, I'm going to arbitrarily name 
c = AB
a = BC
b = AC It just makes the calculations easier.

AB = radius of the large circle - radius of the medium circle = 20.62 - 8.04 = 12.58
BC = Radii of the two smaller circles added together = 8.04 + 7.35 = 15.39
AC = Radius of the large circle - Radius of the small circle = 20.62 - 7.35 = 13.27

So
a = 15.39
b = 13.27
c = 12.58

Step Two
Find Angle A or <BAC
a^2 = b^2 + c^2 - 2*b*c * Cos(A)
15.39^2 = 12.58^2 + 13.27^2 - 2 * 12.58 * 13.27 * Cos(A)
236.852 = 158.26 + 176.1 -  333.87 * Cos(A)
236.852 = 334.4 - 333.87*Cos(A)
-97.55 = - 333.87 *  Cos(A) 
-97.55 / -333.87 = Cos(A)
0.2922 = cos(A)
A = cos-1(0.2922)
A = 73.01 degrees

Step Three
Just to see if you understand what was done, I'll give you the givens for finding c, and the answer and you can work through the calculations to see if your answer agrees with mine. If it doesn't PM me.
c = 12.58
b = 13.27
a = 15.39

12.58^2 = 13.27^2 + 15.39^2 - 2*13.27*15.39*Cos(C)
C = 51.42

Step Four
Find <B
Every triangle has 180 degrees so
B = 180 - <A - C
B = 180 - 51.42 - 74.01
B = <54.57. 
I have found a moderator who opened the question up so that I can show you why the Cos law is the only way to do this. If the circles are very disproportionate as in this diagram, then no simple assumption can be made. The cos law is all that will work. I would have posted this earlier, but I didn't think anyone would find another method. It's ingenious but not possible for the situation below.

3 0
3 years ago
Determine if (3, -1) is a solution to the system.
sp2606 [1]

Answer:

<em>There are a few ways to solve systems of equations. </em>

  1. <em>There are a few ways to solve systems of equations. substitution</em>
  2. <em>There are a few ways to solve systems of equations. substitutionelimination</em>
  3. <em>There are a few ways to solve systems of equations. substitutionelimination </em><em>Graphically</em>

<em>If you are looking at a multiple choice question use the ordered pair to plug into the answer choices and whichever one balances out will be your answer. To assist you further I would need more information from the problem. </em>

Step-by-step explanation:

<em>hope</em><em> it</em><em> will</em><em> help</em><em> you</em><em> have</em><em> a</em><em> great</em><em> day</em><em> bye</em><em> and</em><em> Mark</em><em> brainlist</em><em> if</em><em> the</em><em> answer</em><em> is</em><em> correct</em><em> </em>

<em>kai6417</em>

<em> </em><em>#</em><em>c</em><em>a</em><em>r</em><em>r</em><em>y</em><em> </em><em>on </em><em>learning</em>

8 0
2 years ago
Rectangle ABCD has vertex coordinates A(–1, –1), B(–1, –3), C(–4, –3), and D(–4, –1). It is translated 4 units to the right and
Vera_Pavlovna [14]

the translation takes the point A ( -1, -1)  to (-1+4, 1) =  (3, 1)

The refection in y = x  'flips' the points so  (3, 1) becomes  (1, 3) = A"

Do the same procedure for the other points to get the answer

(you should get B" =  (-3, 3) )

7 0
3 years ago
Need help please don't know this
vesna_86 [32]
Perimeter = 2w + 2l
2(8x+2) + 2(6x + 6)
Use distributive property
16x + 4 + 12x + 12
Combine like terms
28x + 16

Solution: 28x + 16
3 0
2 years ago
Read 2 more answers
The table below shows four systems of equations
vazorg [7]
First Answer. 6x-2y=16. This added to 4x-5y=2 is equal to 10x-7y=18
8 0
2 years ago
Other questions:
  • The slope-intercept form of a linear equation is y = mx + b, where x and y are coordinates of an ordered pair, m is the slope of
    14·1 answer
  • Chris read 20 pages of a novel each day for 9 days during summer break. How many total pages did Chris read during summer break?
    12·1 answer
  • I'm not sure where to begin or end I just need the answers nothing needs to be worked out
    6·1 answer
  • NEED HELP ASAP!!!<br> thank you.
    10·1 answer
  • a nunber is multiplied by 2. then that product is multiplied by 5. write to explain how you know what digit is in the ones place
    15·1 answer
  • Evaluate. ( please please help me if I don’t pass this class I have to retake the year)
    7·1 answer
  • Week 5 Test Taking skills, Page 2
    6·1 answer
  • Question 1 (1 point)
    11·1 answer
  • The ages of armadillos are normally distributed, with a mean of 14 years and a standard deviation of 1.2. Approximately what per
    14·2 answers
  • For the week , emma had originally selected 8 intervals the interval she put up was not picked up or swapped , nor did she show
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!