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
Tatiana [17]
3 years ago
9

an electronic store had a 20% off sale. If a stareo originally cost $125, how much did the stareo cost during the sale?

Mathematics
1 answer:
spayn [35]3 years ago
6 0

Answer:

100

Step-by-step explanation:

You multiply 125 by 0.80.  This is because 125 is the original amount nd to find out how much you have to pay, you would subtract 20% from 100% to get 80%.  Now, you know that you have to pay for 80% of the stereo.  In order to multiply the two numbers together, you have to convert 80% to a decimal which is 0.80.  Lastly, you multiply to get 1oo.  Therefore, the stereo costs $100.00 during the sale.

You might be interested in
How is 56 divided by 8 = 7
8_murik_8 [283]
My say is that 8*7=56 so it would there for be the answer
6 0
3 years ago
Read 2 more answers
The formula for surface area of a cube is 65, where s is the side length of the cube. If the side length of a cube is 4 centimet
Blababa [14]

Answer:

the answer is A

Step-by-step explanation:

5 0
2 years ago
What are the period and phase shift for f(x) = −4 tan(x − π)?
777dan777 [17]
This is the answer Period: π; phase shift: x = π
8 0
3 years ago
In the transmission of digital information, the probability that a bit has high, moderate, and low distortion is 0.02, 0.07, and
Leviafan [203]

Answer:

A. (Table Attached)

B. (See Step 3)

C. 0.06 (See Step 4)

D. NOT independent (See Step 5)

Step-by-step explanation:

<h3 /><h3>STEP 1:</h3>

Name the probabilities:

p₁ = 0.02,   p₂ = 0.07,   p₃ = 0.91

q₁ = 1-p₁ = 0.98 ,   q₂ = 1-p₂ = 0.93 ,   q₃ = 0.09

Let X and Y be the number of bits with high and moderate distortion out of three.

<h3>STEP 2:</h3>

A.

The function will follow multinomial distribution:

f_{XY}(x,y) = P(X=x, Y=y) = \frac{3!}{x!y!(3-x-y)!} (p_1^x)(p_2^y)(p_3^{3-x-y})

Substitute the values and make a table.

TABLE IN ATTACHMENT

<h3>STEP 3:</h3>

B.

We calculate marginal distribution by:

P (X=x)= <em>∑</em> P(X=x,Y=y)

fx(x) can be found by adding all the probabilities in each row for different value of X

For X=0 , ∑P = 0.94157441

For X=1 , ∑P = 0.057624

For X=2 , ∑P = 0.001176

For X=3 , ∑P =0.000008

<h3>STEP 4:</h3><h3>C.</h3>

The mathematic expectation E is the sum of product of each possibility with its probabiity.

E(X)=<em>∑ </em>xP(X=x)

Find E(X):

E(X)= (0*0.9415744)+(1*0.057624)+(2*0.001176)+(3*0.000008)

E(X)=0.06

<h3>STEP 5:</h3>

Condition probability states:

P(A|B)=\frac{P(A,B)}{P(B)}

It can also be written as:

f_{Y|X=1}(y)=\frac{f_{XY}(1,y)}{f_x(1)}

Where f_x(1)\\ = 0.057624

Calculate the quotient:

Y|_{x=1} = 0 ,  f_{Y|_X=1 = 0.862245

Y|_{x=1} = 1 ,  f_{Y|_X=1 = 0.132653

Y|_{x=1} = 2 ,  f_{Y|_X=1 = 0.000510

Y|_{x=1} = 3 ,  f_{Y|_X=1 = 0

Find the dependency:

f_{XY}(y)=f_X(x)f_Y(y)

We found that

f_{Y|_X=1 = 0.862245

Calculate f_Y(1) from summing the column from the table

f_Y(1)=0.17428341+0.007644+0.000084\\f_Y(1)=0.18201141

Which are not equal.

Conclusion:

X and Y are NOT Independent

7 0
3 years ago
How many times can 5 go into 44
UkoKoshka [18]
8 is the answer ....
3 0
3 years ago
Read 2 more answers
Other questions:
  • What is the domain of f(x) = 1992(x + 3) + 2?<br>​
    6·1 answer
  • from his home, Bob would have to walk 3 miles north to get to his friend lucky’s house and 4 miles east to get to his friend ray
    8·1 answer
  • Seventeen students reported how many email accounts they have. The dot plot below shows the data collected: A dot plot is shown
    15·1 answer
  • The diameter of a circle is 46 yards. What is the circle's circumference? d=46 yd Use 3.14 for it.
    14·1 answer
  • Mom used 1/2 package of pepperoni putting an equal amount on each of the three pizza she made what fration of the package of pep
    8·1 answer
  • What is the length of segment BC?
    6·2 answers
  • Write an equation for the n th term of the arithmetic sequence -4, 1, 6, 11 ... Then find a(50)
    8·1 answer
  • 12y = 8x + 29 write in slope intercept form and what is the solution? Show all your work plz help!
    5·1 answer
  • How I can answer this question, NO LINKS, if you answer correctly I will give u brainliest!
    5·2 answers
  • Need done pls will give Brainliest
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!