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
jeyben [28]
3 years ago
11

If 8x−4y=20 and 4x−8y=4, what is the value of x−y?

Mathematics
1 answer:
____ [38]3 years ago
5 0

Answer:

Step-by-step explanation:

Solve the system:

8x−4y=20

4x−8y=4

Reduce the first equation by dividing every term by -2:

-4x + 2y = -10

and then combine this result with the second equation:

4x−8y=4

-4x + 2y = -10

--------------------

      -6y = -6, and so y = 1.  

According to the first equation, if y = 1, then 4x - 8 = 4, or x = 3.

Then x = 3 and y = 1.

So, finally, x - y = 3 - 1 = 2

You might be interested in
In a typical children's soccer game, there is one goal scored approximately every 18 minutes. The number of goals scored follows
Alja [10]

Answer:

2.24

Step-by-step explanation:

The probability formula using a Poisson distribution is:

P(k\ events) = \frac{\lambda^{k}e^{-\lambda}}{k!} \\\lambda\ is\ the\ average\ number\ of\ events\ per\ interval \\e\ is\ euler's\ number \\k\ is\ the\ number\ of\ events\ you\ want\ to\ calculate

λ = 90 / 18 = 5 average goals per interval (interval = a game)

So if for example you were interested in the probability of making 2 goals in a game

k = 2

P(k = 2) = \frac{5^{2}e^{-5}}{2!} = 0.084

This was just an example,

The standard deviation is \sqrt{\lambda}

\sigma = \sqrt{\lambda} \\\sigma = \sqrt{5} \\\sigma = 2.24

8 0
3 years ago
The graph shows the amount of gas in the tank of Sharon's car during a trip to her mom's
disa [49]

Answer: about 8 am

Step-by-step explanation:

that’s just the closest

6 0
3 years ago
Read 2 more answers
B is the midpoint of AC, D is the midpoint of CE, and AE = 9. Find BD.
viva [34]
Answer is on a picture

5 0
3 years ago
All of the following statements about learning are true EXCEPT __
Rasek [7]
Craming last minute can lead to unecessary confusion however most examinars dont allow asking questions during exam

So if asking questions for clarification is allowed. A) is the odd one out

And these options are rather for test taking than learning
3 0
3 years ago
Describe the solution of g(x) shown in the graph.
Ugo [173]

Answer:

All real solutions

Step-by-step explanation:

  • The given graph is a maximum quadratic function.
  • The solution to the graph is where the graph intersects the x-axis.
  • We can see from the graph that, the function intersected the x-axis at two different points, hence its discriminant is greater than zero.
  • Hence the solution of g(x) are two distinct real solutions.
  • The solutions are not whole numbers because the x-intercepts are not exact.
  • The solutions are also not all points that lie on g(x)
  • The first choice is correct.
3 0
3 years ago
Other questions:
  • Plz help ill give brainlist to you
    6·1 answer
  • Is it is it possible to have 43 pencils and divide the pencils into groups with the same number of pencils with none left over
    15·2 answers
  • A tram moved upward 9 meters per second for 36 seconds. What was the total change in the tram's elevation?
    7·1 answer
  • Which statement is true about the extreme value of the given quadratic equation? A. The equation has a maximum value with a y-co
    14·1 answer
  • A middle school needs buses to
    12·2 answers
  • What is 3 1/2 x 4 4/8?
    12·2 answers
  • Multipying these is a pain for me. Please help.
    5·1 answer
  • Rotate 90° clockwise about the origin
    7·1 answer
  • HELP THIS IS DUE IN 15 MINUTE AND I DONT KNOW HOW TO SOLVW IT
    5·1 answer
  • Gabrielle's age is two times Mikhail's age. The sum of their ages is 54. What is Mikhail's age?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!