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olga nikolaevna [1]
3 years ago
9

Place the indicated product in the proper location on the grid (x+y+3)(x+y-4)

Mathematics
1 answer:
pashok25 [27]3 years ago
6 0

Solution:

we have been asked to find the product of (x+y+3)(x+y-4).

we will multiply term by term as below

(x+y+3)(x+y-4)=x(x+y+3)+y(x+y+3)-4(x+y+3)\\\\\ (x+y+3)(x+y-4)=x^2+xy+3x+xy+y^2+3y-4x-4y-12\\\\\text{Now take the like terms together and simplify we get}\\\\(x+y+3)(x+y-4)=x^2+y^2+2xy-x-y-12\\

Hence the the product of (x+y+3)(x+y-4) is x^2+y^2+2xy-x-y-12


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kirza4 [7]
If you have multiple equations with multiple variables, you can either do clever substitutions, or turn it into a matrix on which you can perform linear combinations or multiplications (Gauss elimination)

1  1   1  1
2  1  -1  8
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(note how the above 3 rows represent the 3 equations, just got rid of the variables, plus sign and equals sign)

subtract row1 from row3, that eliminates x and z from row 3.

1  1   1  1
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divide row3 by -2, that will give y a factor of 1

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3 years ago
sheila mixed 3 oz of blue paint wih 2 oz of yellow paint she decided to create 20 oz of he same mixture how many oz of yello pai
FrozenT [24]
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8 0
3 years ago
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The question is:
Naddik [55]

Answer:

2.5 gallons of the 20% solution must be replaced by the 36% solution.

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2 years ago
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Answer:

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Answer:

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Hi,

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I hope this helps :)

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