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
Tpy6a [65]
3 years ago
10

What is the solution of the equation? -10+/x+8=-4

Mathematics
2 answers:
erastovalidia [21]3 years ago
7 0
-10 + <span>√x+8 = -4 is 28</span>
Phoenix [80]3 years ago
4 0
The answer correct response for this x=-32
You might be interested in
Will give brainliest for correct answer
Lemur [1.5K]

Answer:

e

Step-by-step explanation:

ddd

6 0
3 years ago
Read 2 more answers
how to solve 2 to the 8th power divided by 2 to the 9 power? Im trying to find the right exponets topic for this but not having
MArishka [77]

2 to the negative 1 power. When you divide two exponents with the same base, you subtract the two exponents to get your answer.



:)

7 0
3 years ago
Let X and Y be discrete random variables. Let E[X] and var[X] be the expected value and variance, respectively, of a random vari
Ulleksa [173]

Answer:

(a)E[X+Y]=E[X]+E[Y]

(b)Var(X+Y)=Var(X)+Var(Y)

Step-by-step explanation:

Let X and Y be discrete random variables and E(X) and Var(X) are the Expected Values and Variance of X respectively.

(a)We want to show that E[X + Y ] = E[X] + E[Y ].

When we have two random variables instead of one, we consider their joint distribution function.

For a function f(X,Y) of discrete variables X and Y, we can define

E[f(X,Y)]=\sum_{x,y}f(x,y)\cdot P(X=x, Y=y).

Since f(X,Y)=X+Y

E[X+Y]=\sum_{x,y}(x+y)P(X=x,Y=y)\\=\sum_{x,y}xP(X=x,Y=y)+\sum_{x,y}yP(X=x,Y=y).

Let us look at the first of these sums.

\sum_{x,y}xP(X=x,Y=y)\\=\sum_{x}x\sum_{y}P(X=x,Y=y)\\\text{Taking Marginal distribution of x}\\=\sum_{x}xP(X=x)=E[X].

Similarly,

\sum_{x,y}yP(X=x,Y=y)\\=\sum_{y}y\sum_{x}P(X=x,Y=y)\\\text{Taking Marginal distribution of y}\\=\sum_{y}yP(Y=y)=E[Y].

Combining these two gives the formula:

\sum_{x,y}xP(X=x,Y=y)+\sum_{x,y}yP(X=x,Y=y) =E(X)+E(Y)

Therefore:

E[X+Y]=E[X]+E[Y] \text{  as required.}

(b)We  want to show that if X and Y are independent random variables, then:

Var(X+Y)=Var(X)+Var(Y)

By definition of Variance, we have that:

Var(X+Y)=E(X+Y-E[X+Y]^2)

=E[(X-\mu_X  +Y- \mu_Y)^2]\\=E[(X-\mu_X)^2  +(Y- \mu_Y)^2+2(X-\mu_X)(Y- \mu_Y)]\\$Since we have shown that expectation is linear$\\=E(X-\mu_X)^2  +E(Y- \mu_Y)^2+2E(X-\mu_X)(Y- \mu_Y)]\\=E[(X-E(X)]^2  +E[Y- E(Y)]^2+2Cov (X,Y)

Since X and Y are independent, Cov(X,Y)=0

=Var(X)+Var(Y)

Therefore as required:

Var(X+Y)=Var(X)+Var(Y)

7 0
3 years ago
In the expression (x^2 + 3), the base is ?
azamat
Answer to your question
The base is X
What are the other stuff then?
2 is the power
3 is the constant

8 0
2 years ago
Carl sells $450 worth of merchandise. How much money will Carl get to keep if he receives 30% commission?
ollegr [7]

Answer:

B

Step-by-step explanation:

can I get brainliest :)

6 0
3 years ago
Read 2 more answers
Other questions:
  • A machine produces parts that are either defect free (90%), slightly defective (3%), or obviously defective (7%). Prior to shipm
    14·1 answer
  • An exponential function f(x) is reflected across the y-axis to create function g(x). Which is a true statement regarding f(x) an
    10·2 answers
  • What is the volume of this cube?
    11·2 answers
  • Write -7.5 as a common fraction.
    8·1 answer
  • If r(x) = 2 – x2 and w(x) = x – 2, what is the range of ? (w0r)(x)
    8·2 answers
  • What is this? 2x-y=2
    6·1 answer
  • A jar has 15 red marbles and 17 yellow marbles
    13·1 answer
  • The committee is planning to have frozen fruit bars for desert. If frozen fruit bars come in boxes of 12, how many boxes of froz
    6·1 answer
  • Please help me yall
    15·1 answer
  • Using the data from the theoretical probability table, what is the probability of the spinner landing only once on yellow in two
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!