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3 years ago

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

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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

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:

Step-by-step explanation:

they = to the same thing

5 0

2 years ago

PLEASE SHOW ALL WORK!WILL MARK BRAINLIEST!!​

PLEASE SHOW ALL WORK!WILL MARK BRAINLIEST!!