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katrin [286]
3 years ago
10

How many solutions does the system have? y= -2x - 4 y= 3х + 3

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0

Answer:

One solution

Step-by-step explanation:

The system has one solution and that is (-1.4, -1.2)

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Please help, I’ll give brainly!!!
Sever21 [200]

Answer:

9.

3 ( 1 - 3x ) = 2 (-4x + 7)

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-9x +8x  = 14 - 3

-x = 11

x = -11

10.

-10 + x + 4 - 5 = 7x - 5

-10 +x -1 = 7x - 5

-11 + x = 7x - 5

-11 + 5 = 7x -x

-6 = 6x

x = -6/6

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11.

-8n + 4 ( 1 + 5n ) = -6n -14

-8n + 4 + 20n = -6n -14

12n +4 = -6n -14

12n  + 6n = -14 -4

18n = -18

n = -18/18

n = -1

12.

-6n - 20 = -2n + 4 ( 1 - 3n)

-6n - 20 = -2n + 4 - 12n

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-20 -4 = -14n +6n

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n = -24/8

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13.

4n - 40 = 7 (-2n +2)

4n - 40 =  -14n + 14

4n +14n = 14 +40

18n = 54

n = 54 / 18

n = 3

14.

7(5a - 4) -1 = 14 - 8a

35a -28 -1 =  14 - 8a

35a -29 = 14 - 8a

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a = 43/43

a = 1

15.

-31 - 4x = -5 - 5 ( 1 + 5x)

-31 - 4x = -5  -5 - 25x

-31 - 4x = -10 -25x

-4x +25x = -10 +31

21x = 21

x = 21/21

x = 1

16.

38 +7k = 8 (k +4)

38 +7k = 8k + 32

38 - 32 = 8k -7k

k = 6

8 0
3 years ago
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Step-by-step explanation:

It just depends on the grade level but that is a standard equation. The ddd would stand for dollars spent at the park. If you did $205-$160 you’d get $45. So she would have spent $45 at the park :)

4 0
2 years ago
-3(x-2)=9(x+8) how do I solve for x?
choli [55]

Answer:x=-5.5

Step-by-step explanation:

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2 years ago
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Which of the following summations represent the series shown? Check all that apply.
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Step-by-step explanation:

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Step-by-step explanation:

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