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dalvyx [7]
3 years ago
13

State if the point (-3, -2) is a solution to the system of equations below.

Mathematics
1 answer:
Grace [21]3 years ago
4 0

Answer:

B) Since (-3,-2) does not satisfy both equations, it is not a solution to the

system.

Step-by-step explanation:

The given system of equations is:

{x}^{2}  +  {y}^{2}   + x - 10y - 3 = 0

x + y =  - 4

If (-3,-2) is a solution, then it must satisfy both equations:

Let us substitute into the first equation to get:

{( - 3)}^{2}  +  {( - 2)}^{2}   + ( - 3) - 10( - 2) - 3 = 0

Evaluate the exponents;

9 +  4   - 3  + 20- 3 = 0

27 = 0

This is not true

Also when we substitute into the scond equation, we get;

- 3 +  - 2 =  - 4 \\  - 5 =  - 4

This is also false.

Therefore the point is not a solution.

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Which of the following is equivalent to the expression below for x≠6?
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Answer:

The fourth answer choice is the correct one:  2(x - 3)

Step-by-step explanation:

2x²-18x+36/x-6 should be factored, as follows:

2(x²-9x+18) / (x-6) = 2(x - 3) (x - 6) / (x - 6)

Substituting x = 6 would result in division by zero and is thus not allowed.

Remembering this, we can reduce 2(x - 3) (x - 6) / (x - 6) to 2(x - 3) for x≠6.

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3 years ago
he ratio of your monthly allowance to your friend’s monthly allowance is 5 : 3. Both of your monthly allowances total $40. How m
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Answer:

your allowance is $25 and your friends is $15

Step-by-step explanation:

40/8*3=15

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2 years ago
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How many solutions exist for the given equation 3x+13=3(x+6)+1 zero one two infinity many
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Answer:

Zero

Step-by-step explanation:

Given: 3x+13=3(x+6)+1

Step 1: Expand

3x+13=3x+19

Step 2: Subtract 3 from both sides

3x+13-13=3x+19-13

Step 3: Simplify

3x=3x+6

Step 4: Subtract 3x from both sides

3x-3x=3x-3x+6

Step 5: Simplify

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NO REAL SOLUTIONS

Hope this helps and if it does, don't be afraid to give my answer a "Thanks" and maybe a Brainliest if it's correct?  

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2 years ago
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Allen is buying a video game that originally costs $49. He has a 10%-off
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Jina wanted to study how the area of a rectangle changes with the length if it’s width is fixed. She computed the areas of sever
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Answer:

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Step-by-step explanation:

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Dom\{f\} = [0\,m,5\,m]

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