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kotegsom [21]
3 years ago
7

Solve the system of linear equations below.

Mathematics
2 answers:
Reika [66]3 years ago
8 0

Answer:

x = 1 , y = 3 thus: A is your Anser

Step-by-step explanation:

Solve the following system:

{2 x + y = 5 | (equation 1)

x + y = 4 | (equation 2)

Subtract 1/2 × (equation 1) from equation 2:

{2 x + y = 5 | (equation 1)

0 x+y/2 = 3/2 | (equation 2)

Multiply equation 2 by 2:

{2 x + y = 5 | (equation 1)

0 x+y = 3 | (equation 2)

Subtract equation 2 from equation 1:

{2 x+0 y = 2 | (equation 1)

0 x+y = 3 | (equation 2)

Divide equation 1 by 2:

{x+0 y = 1 | (equation 1)

0 x+y = 3 | (equation 2)

Collect results:

Answer:  {x = 1 , y = 3

Alla [95]3 years ago
5 0

Answer:

A. x=1, y=3

Step-by-step explanation:

Hello, I can help you with this.

step 1

use elimination to solve this

Let (1) and (2)

(1)2x+y=5

(2)x+y=4

do (1)-(2) to eliminate y and solve for x

2x+y=5

-(x+y=4)

_______

(2x-x)+(y-y)=5-4

x=1

using x= 1 replace in (1) and isolate y

(1)2x+y=5

x=1

2(1)+y=5

2+y=5 (subtract 2 on each side)

2+y-2=5-2

y=3

so, the solution is

A. x=1, y=3

I really hope it helps, Have a good day.

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As of April 2006, roughly 50 million web domain names were registered (e.g., ). How many domain names consisting of just two let
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Answer:

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Step-by-step explanation:

firstly we know that there are 26 letters in the alphabet.

there are 26 ways of choosing the first character and 26 ways choosing the second character,

Therefore, the possible number of domains with two leeter is;

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