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kogti [31]
3 years ago
8

What is the solution of the system ? 2x+3y=4 x-y=-3

Mathematics
1 answer:
fgiga [73]3 years ago
6 0
Change the equation, x - y = -3, to isolate x or y and plug that new equation into the equation 2x + 3y = 4

I changed it to: x = y - 3
so 
2(y - 3) + 3y = 4
2y - 6 + 3y = 4
5y - 6 = 4
5y = 4 + 6
5y = 10
y = 10/5
y = 2

then you plug that 2 into the equation x = y - 3 to get the value of x

x = (2) - 3
x = -1

you can check this by plugging the x and y values into the equation 2x + 3y = 4

2(-1) + 3(2) = 4
-2 + 6 = 4
4 = 4

hope this helps :)




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Harlamova29_29 [7]

Option D:

The set is {-2, -1, 0, 1, 2, 3, 4}.

Solution:

Given set:

\{x \in Z:-2 \leq x \leq 4\}

Z means integer values.

Integer means set of positive and negative values including zero.

-2 \leq x \leq 4

This means x lies between -2 and 4.

  • If x strictly less than -2 and greater than 4 means you don't have to include -2 and 4.
  • But here x less than or equal to -2 and greater than or equal to 4, so you have to include -2 and 4.

The integers are -2, -1, 0, 1, 2, 3 and 4.

So, x belongs to the set {-2, -1, 0, 1, 2, 3, 4}

Hence the given set is defined by the set  {-2, -1, 0, 1, 2, 3, 4}.

Option D is the correct answer.

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3 years ago
What is the measure of NMR? <br><br> 27<br> 63<br> 107<br> 117
ASHA 777 [7]
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4 years ago
I need the answer for 90 please its due tommorow!
babunello [35]
Jacqueline is incorrect. 
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Jacqueline said you would be able to clean 19/3 miles but you can actually clean 20/3.
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3 years ago
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この問題を最も簡単に解決する. 不適切な回答はありません.
Dafna1 [17]

japones ^^

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and the answer that comes out of the multiplication is the correct one

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3 years ago
What’s 16.0+8.49 <br> By showing work?
natka813 [3]

Answer:

24.49

Step-by-step explanation:

16.00

8.49

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24.49

6 0
3 years ago
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