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melisa1 [442]
2 years ago
14

Hiiio!❤️ Could someone please help me with this question!❤️❤️❤️

Mathematics
1 answer:
Aneli [31]2 years ago
3 0

Answer:

What question

Step-by-step explanation:

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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
Shonda earns $10 per hour at Sneakers Plus. She is also paid a $2 commission on every pair of sneakers she sells. How much did S
daser333 [38]

Answer:

78

Step-by-step explanation:

6*10=60

2*9=18

60+18=78

3 0
3 years ago
<17 and <18 are vertical angles. m <17=(5x+3)(degrees) and m<18=(3x+23)(degrees) find the measure of <18
UNO [17]
I think c is the answer to ur question
7 0
3 years ago
Aden buys 15 collectible coins per month. Caliana sells 5 coins from her collection of 100 each month. When will Aden have more
Lorico [155]

The number of months it will take for Aden to have more coins than Caliana is greater than 5 months

<h3 /><h3>How to write and solve equation?</h3>

Aden:

  • Number of coins bought per month = 15

Caliana:

  • Number of coins sold from her collection = 5

let

x = number of months

Aden = Caliana

15x > 100 - 5x

collect like terms

15x + 5x > 100

20x > 100

x > 100/20

x > 5 months

Learn more about equation:

brainly.com/question/2972832

#SPJ1

5 0
2 years ago
A typical bowling ball has a mass of 8 kg and a radius of 12 cm. Which measurement is closest to the volume of the ball in cubic
USPshnik [31]

Answer:

B

Step-by-step explanation:

5 0
3 years ago
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