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Alex17521 [72]
3 years ago
12

it was -11 degrees. She checked again later and it was -2 degrees . Express the change in tempature as a integer Help me !

Mathematics
2 answers:
Anon25 [30]3 years ago
8 0

Answer:-9

Step-by-step explanation:

zzz [600]3 years ago
4 0

Answer:

There was a +9 change in temperature

Step-by-step explanation:

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Solve the following system of equations.
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Answer:

(2,-3)

Step-by-step explanation:

I am not sure if you meant the first equation to be y or -y.  I solved it as y.

y = x-5                       -x -3y =7

I am going to take the second equation and write it as x =

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x = -3y-7  Multiplied each term in the equation by -1 so that x could be positive

I am going to substitute -3y-7 for x in the first equation up above

y = x - 5

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y = -3y -12  Combined -7-5

4y = -12  Added 3y to both sides

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I now know that y is -3, I will plug that into x = -3y-7 to solve for x

x = -3(-3) -7

x = 9-7   A negative times a negative is a positive

x = 2

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