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
Fofino [41]
3 years ago
7

BRAINLIEST IF CORRECT !!!! in ABC m

Mathematics
2 answers:
34kurt3 years ago
7 0

Answer:

b i think im not sure

Step-by-step explanation:

Ilya [14]3 years ago
4 0
Answer:B
I just copied the other dude
You might be interested in
Please help with math and please show your work will give brainliest
Burka [1]

Answer:

The Elimination Method is based on the Addition Property of Equality. The Addition Property of Equality says that when you add the same quantity to both sides of an equation, you still have equality. We will extend the Addition Property of Equality to say that when you add equal quantities to both sides of an equation, the results are equal.

For any expressions a, b, c, and d,

if  and  then a=bc=da+c=b+d

To solve a system of equations by elimination, we start with both equations in standard form. Then we decide which variable will be easiest to eliminate. How do we decide? We want to have the coefficients of one variable be opposites, so that we can add the equations together and eliminate that variable.

Notice how that works when we add these two equations together:

3x+y=52x−y=0–––––––––––5x=5

The y’s add to zero and we have one equation with one variable.

Let’s try another one:

{x+4y=22x+5y=−2(5.3.3)

This time we don’t see a variable that can be immediately eliminated if we add the equations.

But if we multiply the first equation by −2, we will make the coefficients of x opposites. We must multiply every term on both sides of the equation by −2.

This figure shows two equations. The first is negative 2 times x plus 4y in parentheses equals negative 2 times 2. The second is 2x + 5y = negative 2. This figure shows two equations. The first is negative 2x minus 8y = negative 4. The second is 2x + 5y = -negative 2.

Now we see that the coefficients of the x terms are opposites, so x will be eliminated when we add these two equations.

Add the equations yourself—the result should be −3y = −6. And that looks easy to solve, doesn’t it? Here is what it would look like.

This figure shows two equations being added together. The first is negative 2x – 8y = −4 and 2x plus 5y = negative 2. The answer is negative 3y = negative 6.

We’ll do one more:

{4x−3y=103x+5y=−7

It doesn’t appear that we can get the coefficients of one variable to be opposites by multiplying one of the equations by a constant, unless we use fractions. So instead, we’ll have to multiply both equations by a constant.

We can make the coefficients of x be opposites if we multiply the first equation by 3 and the second by −4, so we get 12x and −12x.

This figure shows two equations. The first is 3 times 4x minus 3y in parentheses equals 3 times 10. The second is negative 4 times 3x plus 5y in parentheses equals negative 4 times negative 7.

This gives us these two new equations:

{12x−9y−12x−20y=30=28

When we add these equations,

\[{12x−9y=30−12x−20y=28–––––––––––––––––−29y=58

\]

the x’s are eliminated and we just have −29y = 58.

Once we get an equation with just one variable, we solve it. Then we substitute that value into one of the original equations to solve for the remaining variable. And, as always, we check our answer to make sure it is a solution to both of the original equations.

Now we’ll see how to use elimination to solve the same system of equations we solved by graphing and by substitution

Step-by-step explanation:

Here is some examples

4 0
2 years ago
On a circle of radius 7 feet, what wlangke would substend an arc of length 7 feet?
Elenna [48]
Arc length = radius * central angle (in radians)
central angle = arc length / radius
central angle = 7 / 7
central angle = 1 radian
central angle = 57.296 degrees

6 0
3 years ago
According to a poll, 55 % of Americans do not know that GOP stands for Grand Old Party (Time, October 17, 2011). Assume that thi
Ivenika [448]

Answer:

\hat p  \sim N (p , \sqrt{\frac{p(1-p)}{n}})

The mean is given by:

\mu_{\hat p} = 0.55

And the deviation:

\sigma_{\hat p} =\sqrt{\frac{0.55*(1-0.55)}{953}}= 0.0161

Step-by-step explanation:

For this case we assume that the true population proportion of Americans do not know that GOP stands for Grand Old Party is 0.55 and we select a random sample of n = 953 americans

For this case we assume that we satisfy the conditions to use the normal approximation for \hat p

1) np >10 , n(1-p)>10

2) Independence

3) Random sample

4) The sample size is less than 10% of the population size

We assume that all the conditions are satisfied and the distribution for \hat p would be:

\hat p  \sim N (p , \sqrt{\frac{p(1-p)}{n}})

The mean is given by:

\mu_{\hat p} = 0.55

And the deviation:

\sigma_{\hat p} =\sqrt{\frac{0.55*(1-0.55)}{953}}= 0.0161

3 0
3 years ago
What is the value of x in the equation cx+<br> (x + 12) = {<br> = (x + 14) – 3?
castortr0y [4]

Answer:

x= - 1/c

Step-by-step explanation:

8 0
3 years ago
I need help on the answer
kodGreya [7K]

Answer:

Step-by-step explanation:

First, we have to find 1 percent of 950, then we will multiply it by 8, and then we will add the solution to 950 to see if it exceeds her budge. So:

950/100 = 9.5

9.5 (8) = 76

950 + 76 = 1026

1026 > 1000, so she does not have enough money to but the T.V.

5 0
3 years ago
Other questions:
  • Write the equation in exponential form. log4 1/16 = -2
    14·1 answer
  • Solve the absolute value equation,if possible. If there is no solution, explain. I 5x + 10 I = -7
    9·1 answer
  • ** FOR 30 POINTS**<br><br> what is the height of the triangular prism shown above?
    10·1 answer
  • You have 2,112 grams of a radioactive kind of mercury. How much will be left after 188 days if it's half-life is 47 days?
    6·1 answer
  • In Juan's coin bank there are nickels (n),
    11·1 answer
  • Select the correct answer. 7 2 2 4 Which of the following inequalities is graphed on the coordinate plane? O A y &gt; 2r + 2 B.
    5·1 answer
  • A recipe calls for 8 cups of flour for every 4 cups of sugar. How many cups of sugar are used for each cup of flour?
    13·2 answers
  • Factor expression 10x + 25
    15·1 answer
  • The temperature outside is 4F. The temperature drops 6F.
    10·1 answer
  • Brian has ridden 38 miles of a bike course. The course is 40 miles long. What percentage of the course has Brian ridden so far?​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!