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zimovet [89]
3 years ago
5

Use addition or substitution to find the value of y for this set of equations. 4x + 13y = 40 4x + 3y = -40

Mathematics
1 answer:
Aliun [14]3 years ago
5 0
4x + 13y = 40
4x + 3y = -40

multiply second equation by -1

4x + 13y = 40
-4x - 3y = 40

add equations together

10y = 80
y = 8

put y in either original equation

4x + 3(8) = -40
4x + 24 = -40

subtract 24 from both sides

4x = 64

x=16
y=8
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Katy uses 1 8/9 bags of chocolate chips in one batch of cupcakes. if she has 3 11/12 bags of chocolate chips left, about how man
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3 years ago
An open rectangular box with square base has a volume of 256 cubic inches. determine the equation for the volume and surface are
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Let
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substitute equation 1 in equation 2
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the answer is

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the formula of the surface area of the box are
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3 years ago
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seropon [69]
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3 years ago
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