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Sauron [17]
3 years ago
12

What is the first step to take when solving this linear system of equations by the addition-subtraction method? 2x + 4y = 3 x +

3y =13
Mathematics
1 answer:
atroni [7]3 years ago
7 0

Hey!

2x + 4y = 3x + 3y = 13

2x + 4y = 13 ------------ ( 1 )

3x + 3y = 13 -------------- ( 2 )

Now, we will need to eliminate one type of the term , let us eliminate the x terms

Let us multiply the first equation with 3 and the second equation with 2

3 ( 2x + 4y ) = 3 ( 13 )

2 ( 3x + 3y ) =  2 ( 13 )

................................................................................................................................................

6x + 12y = 39 ----------------- ( 1 )

6x + 6y =  26 ---------------------- ( 2 )

Now, let us subtract the second equation from the first equation

6x + 12y = 39

-6x - 6y = - 26

.........................................

6y = 13

y = 13 / 6

...........................................

Now substitute the value of ' y ' and we can get the value of ' x '

I will take 3x + 3y = 13

3x + ( 3 ) ( 13 / 6 ) = 13

3x + 13 / 2 = 13

3x = 13 - 13/2

LCM = 2

3x = 26 - 13 / 2

3x = 13 / 2

x = 13/2 / 3

x = 13/2 × 1/3

x = 13/6

Hope my answer helps!


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Katen [24]
3(4x+3) = 12x + 9
A= 3(4x+1)
B= 9 + 12x
C= 7x + 6
D= 12x + 9
E= 12x + 9

Answer: D, E

Hope This Helps✨
3 0
3 years ago
Can someone pls explain this?
ryzh [129]

Answer:

A piecewise function.

Step-by-step explanation:

The problem you showed is a <em>piecewise function.</em>

In this problem, you have to plug in 3 for the value x.

However, if you take a look at the conditions that value x has, it never says that x can equal 3. <em>Thus, this function cannot be true.</em>

<em>Way to check this input is undefined: </em>

Plug in 3 for the variable x. On the first function, your output will be 4. On the second function, your output will be 8.

According to the definition of a function, a function can have many inputs but only one output. In this case, this function has one input, that is 3, but produces two outputs.

8 0
2 years ago
A positive integer is 47 more than 9 times another. Their product is 1860. Find the two integers.
svlad2 [7]
X = 47 + 9y
xy = 1860

y(47 + 9y) = 1860
47y + 9y² = 1860
9y² + 47y - 1860 = 0

> using a quadratic equation solver on a calculator but you can also use the quadratic equation = [-b+/- √(b²-4ac)]/(2a)
> only integer solution is x = 12

12y = 1860
y = 155

integers are 12 and 155


8 0
3 years ago
The question is down bellow!!!
BartSMP [9]
D............a raisin is about 1 cm long

6 0
3 years ago
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Six ft or two meters
matrenka [14]
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