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aev [14]
3 years ago
5

Use the method of ELIMINATION to solve the system. You must SHOW ALL WORK. Make sure you have an answer for both x and y.

Mathematics
2 answers:
jekas [21]3 years ago
6 0

Answer:

<h3>Required <u>Answer</u><u>:</u><u>-</u></h3>

\sf 4x+8y=10\dots\dots (1)

\sf -4x+2y=-30\dots\dots (2)

  • by adding eq (1) and eq (2) we get

{:}\longrightarrow\sf 4x+8y=20

{:}\longrightarrow\sf -4x+2y=-30

<h2>__________________________</h2>

{:}\longrightarrow\sf 10y=-10

{:}\longrightarrow\sf y={\dfrac {-10}{10}}

{:}\longrightarrow{\underline{\boxed{\bf y=-1}}}

  • Substitute the value in eq (2)

{:}\longrightarrow\sf -4x+2 (-1)=-30

{:}\longrightarrow\sf -4x-2=-30

{:}\longrightarrow\sf -4x=-30+2

{:}\longrightarrow\sf -4x=-28

{:}\longrightarrow\sf x={\dfrac {-28}{-4}}

{:}\longrightarrow{\underline{\boxed{\bf x=7}}}

\therefore{\underline{\boxed{\bf (x,y)=(7,-1)}}}

Reptile [31]3 years ago
6 0
(7,-1) will be you’re answer
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Answer:

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Step-by-step explanation:

The second step of the solution shows division by 2 on the left. Consequently, it must also show division by 2 on the right.

  2 goes in the green box

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3 years ago
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vlada-n [284]

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

To solve this, we will be doing a semi-alternate route, but it will get us to our answer...


400 / 100 = 4

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<em></em><em>Lets plug it into our meters to miles formula...</em>

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The answer is:  The Polar Express was going 27,000 meters per hour (or roughly close to 16.777 miles per hour)...

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3 years ago
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kari74 [83]

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Step-by-step explanation:

6 0
2 years ago
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sashaice [31]

Answer: 13

Step-by-step explanation:

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3 0
3 years ago
Can u guys please help me with my math homework.
Sladkaya [172]
1.) circumference: 2(pi)r (use the pi sign) Area: pi(r^2)

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