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wel
3 years ago
11

Select the correct answer.

Mathematics
2 answers:
mylen [45]3 years ago
7 0

Answer: x= 10. y= 2

Step-by-step explanation:

From the first statement :

x + y = 12

And from the second statement :

x - 2y = 6

combining the two equations we have :

x + y = 12 .......................... equation 1

x - 2y = 6 .......................... equation 2

solving the system of simultaneous linear equation by substitution method , from equation 1 , make x the subject of the formula , that is

x = 12 - y ........................... equation 3

substitute  x = 12 - y into equation 2 , then we have

12 - y - 2y = 6

12 - 3y = 6

12 - 6 = 3y

6 = 3y

Therefore : y = 2

substitute y = 2 into equation 3 to find the value of x , that is

x = 12 - y

x = 12 - 2

x = 10

SIZIF [17.4K]3 years ago
6 0

Answer:

work is pictured and shown

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I just need to know how to do it im just to lazy to look it up
aalyn [17]

Answer:

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4 0
3 years ago
Read 2 more answers
What are three different methods for solving systems of equations and when would you use each one?
Marrrta [24]

The first method is substitution. This is when the x or y value that is known is substituted into one of the equations. This should be done when you can easily see or find the x or y value.

Example: x = 3, and x + 8y = 30.

The x was given in the first equation (x = 3), and can therefore be substituted into the other equation to find y.

The next method is elimination. This is when you add the two systems together and eliminate either the x values or the y values. This should be done when there are opposite signs of the same number in both equations.

Example: y - 3x = 24, and 2y + 3x = 7

In the first equation you have -3x, and in the second you have 3x. If you were to add the two equations, the x values would cancel out and you would be left with:

y + 2y = 24 + 7

And then you could solve for y.

The last method is to graph both equations and to see at which point the lines intersect.

7 0
3 years ago
olivia necesita dividir un carrete de liston que mide 75 metros en 4 partes iguales cuanto debe medir cada liston
kykrilka [37]
<span>La respuesta es 18.75</span>
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lesya [120]

Answer:

my answer is 3:5

Step-by-step explanation:

sana makatulong yan

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