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
r-ruslan [8.4K]
3 years ago
15

PLEASE SHOW ALL WORK!WILL MARK BRAINLIEST!!​

Mathematics
1 answer:
svetoff [14.1K]3 years ago
4 0
I’m sorry bc I don’t know how to solve all of them but
#5 is C
#3, the equation is y=4
#4, the equation is x=-6
You might be interested in
I SWEAR PLS SOMEONE HELP ME W THIS
stepladder [879]

Answer:

m = 4/1 (4)

b = -5

equation = y = 4x-5

3 0
2 years ago
34
kvv77 [185]
140 sandwiches sold :)
4 0
2 years ago
Determine whether a probability distribution is given. If a probability distribution is given, find its mean and standard deviat
drek231 [11]

Answer:

E(X) = \sum_{i=1}^n X_i P(X_i) = 0*0.031 +1*0.156+ 2*0.313+3*0.313+ 4*0.156+ 5*0.031 = 2.5

We can find the second moment given by:

E(X^2) = \sum_{i=1}^n X^2_i P(X_i) = 0^2*0.031 +1^2*0.156+ 2^2*0.313+3^2*0.313+ 4^2*0.156+ 5^2*0.031 =7.496

And we can calculate the variance with this formula:

Var(X) =E(X^2) -[E(X)]^2 = 7.496 -(2.5)^2 = 1.246

And the deviation is:

Sd(X) = \sqrt{1.246}= 1.116

Step-by-step explanation:

For this case we have the following probability distribution given:

X          0            1        2         3        4         5

P(X)   0.031   0.156  0.313  0.313  0.156  0.031

The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.

The variance of a random variable X represent the spread of the possible values of the variable. The variance of X is written as Var(X).  

We can verify that:

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

And P(X_i) \geq 0, \forall x_i

So then we have a probability distribution

We can calculate the expected value with the following formula:

E(X) = \sum_{i=1}^n X_i P(X_i) = 0*0.031 +1*0.156+ 2*0.313+3*0.313+ 4*0.156+ 5*0.031 = 2.5

We can find the second moment given by:

E(X^2) = \sum_{i=1}^n X^2_i P(X_i) = 0^2*0.031 +1^2*0.156+ 2^2*0.313+3^2*0.313+ 4^2*0.156+ 5^2*0.031 =7.496

And we can calculate the variance with this formula:

Var(X) =E(X^2) -[E(X)]^2 = 7.496 -(2.5)^2 = 1.246

And the deviation is:

Sd(X) = \sqrt{1.246}= 1.116

6 0
3 years ago
Kaylee has $100 to put toward purchasing a computer and plans on paying $30 a month until she pays off the value of the computer
yKpoI14uk [10]

Answer:

y=100-30x

Step-by-step explanation:

3 0
3 years ago
Write the log equation as an exponential equation. Log9 (2x-7) = 2x-3
antiseptic1488 [7]

Answer:

14

Step-by-step explanation:

they = to the same thing

5 0
2 years ago
Other questions:
  • In order to budget successfuly, one must make a. a lot of money. c. expensive purchases. b. healthy financial choices. d. sure t
    9·2 answers
  • How do I solve this? And what's the answer.. I'm so lost.
    12·1 answer
  • 6 more than 5 times a number y
    13·2 answers
  • The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p
    14·1 answer
  • If there is no solution to a graph of a system of equations, then the lines must be __________.
    11·1 answer
  • What is 2/9+3/5 and does any one know how to do the work
    13·2 answers
  • With is the answer for this multiplication <br> (3x+5) (3-5)
    6·1 answer
  • Help me please <br><br> Increase 55 by 137%
    10·2 answers
  • Three students earned 48.76 at the bake sale.the students split the earnings evenly,how much did each student receive
    13·1 answer
  • A boat's capacity plate gives the maximum weight and/or number of people the boat can carry safely in certain weather conditions
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!