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
Flura [38]
3 years ago
12

I don't even know where to start on this problem?

Mathematics
1 answer:
velikii [3]3 years ago
7 0
I think you have to count 85 and go down like 85 86 87so the answer is 15
You might be interested in
Which of the following is not a geometric tool?
yuradex [85]

Answer:

C. Protractor

4 0
3 years ago
Read 2 more answers
Let represent the number of tires with low air pressure on a randomly chosen car. The probability distribution of is as follows.
Sindrei [870]

Answer:

a) P(X=3) = 0.1

b) P(X\geq 3) =1-P(X

And replacing we got:

P(X \geq 3) = 1- [0.2+0.3+0.1]= 0.4

c) P(X=4) = 0.3

d) P(X=0) = 0.2

e) E(X) =0*0.2 +1*0.3+2*0.1 +3*0.1 +4*0.3= 2

f) E(X^2)= \sum_{i=1}^n X^2_i P(X_i)

And replacing we got:

E(X^2) =0^2*0.2 +1^2*0.3+2^2*0.1 +3^2*0.1 +4^2*0.3= 6.4

And the variance would be:

Var(X0 =E(X^2)- [E(X)]^2 = 6.4 -(2^2)= 2.4

And the deviation:

\sigma =\sqrt{2.4} = 1.549

Step-by-step explanation:

We have the following distribution

x      0     1     2   3   4

P(x) 0.2 0.3 0.1 0.1 0.3

Part a

For this case:

P(X=3) = 0.1

Part b

We want this probability:

P(X\geq 3) =1-P(X

And replacing we got:

P(X \geq 3) = 1- [0.2+0.3+0.1]= 0.4

Part c

For this case we want this probability:

P(X=4) = 0.3

Part d

P(X=0) = 0.2

Part e

We can find the mean with this formula:

E(X)= \sum_{i=1}^n X_i P(X_i)

And replacing we got:

E(X) =0*0.2 +1*0.3+2*0.1 +3*0.1 +4*0.3= 2

Part f

We can find the second moment with this formula

E(X^2)= \sum_{i=1}^n X^2_i P(X_i)

And replacing we got:

E(X^2) =0^2*0.2 +1^2*0.3+2^2*0.1 +3^2*0.1 +4^2*0.3= 6.4

And the variance would be:

Var(X0 =E(X^2)- [E(X)]^2 = 6.4 -(2^2)= 2.4

And the deviation:

\sigma =\sqrt{2.4} = 1.549

4 0
3 years ago
Find the mean for the data set. 7, 6, 7, 7, 7, 4, 4, 6, 5, 5, 7
saul85 [17]

Answer:

5.909

Step-by-step explanation:

8 0
3 years ago
Please help me<br> Sooo confused!!!
SashulF [63]
Well let's say x = -1000
That's what I would do
8 0
3 years ago
Read 2 more answers
What is the square root of 2​
Aliun [14]

Answer: is 1.41421 hope this helps :)

6 0
3 years ago
Read 2 more answers
Other questions:
  • How many of the first 10,000 positive integers contain the digit pair “43” in that order?
    8·1 answer
  • There were 5 people who bought
    6·2 answers
  • ABCD is a parallelogram. AC = 9cm, DC = 11cm, angle DAC = 100'. Calculate the area of the parallelogram
    13·1 answer
  • He values in the table represent a linear function. How does the value of y change in relation to a change in the value of x?
    15·1 answer
  • Please help I’ll give points + brainalist
    12·1 answer
  • Help me with this please
    13·2 answers
  • Hola mep resentida me llamó Daniela soy nueva Aki tengo 13 años bueno puntos GRATIS​
    8·2 answers
  • Find the area of the figure shown. Please someone helppppp
    8·1 answer
  • 20 Points pls Help !
    15·1 answer
  • The U.S. 2010 federal income tax for a single person with taxable income x dollars is f(x) dollars, where T is the function defi
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!