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stira [4]
2 years ago
14

Who can give me some extra points I need it please​

Mathematics
2 answers:
Fiesta28 [93]2 years ago
8 0

Answer: sometimes I do giveaways for free points on my page! I may do one later today!!

Step-by-step explanation:

umka21 [38]2 years ago
3 0

Answer:

meeeee I want free points

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Which of the following shows no correlation between the independent and dependent variables?
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D doesn’t show a positive or negative correlation. D is the best answer choice.
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A(-2,3)<br> B(2,3)<br> C(2,-3)<br> D(-2,-3)<br> Math question please help
Snowcat [4.5K]
The number on the left is the x, and the number on the right is the y. so if the x is negative, then it would be on the x axis line. and you always use the x line first.
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3 years ago
If (x, y) = (3, 4) is a solution of the simultaneous equations.
Vinvika [58]
The first thing you want to do is plug in x and y into both equations:

a(3) + b(4) = 4

b(3) + a(4) = 8

rearrange to line up a’s and b’s

3a + 4b = 4

4a + 3b = 8

now you want to choose a or b and multiply each equation by a number to make them have the same amount of a’s or b’s.

4(3a + 4b = 4) = 12a + 16b = 16

3(4a + 3b = 8) = 12a + 9b = 24


Now we subtract the bottom equation from the top and solve for b:

12a + 16b - (12a + 9b) = 16 - 24

7b = -8

b = -8/7


Now we plug back in for b to one of the original equations:

3a + 4(-8/7) = 4

3a + (-32/7) = 4

3a - (32/7) = 4

3a = 4 + (32/7)

3a = (28/7) + (32/7)

3a = 60/7

a = (60/7)/3 = 20/7.


Finally, plug a and b in together to double check using the second equation.

4a + 3b = 8

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(80/7) - (24/7) = ?

56/7 = 8.
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2 years ago
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