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Morgarella [4.7K]
3 years ago
10

Please help me with my math homework??

Mathematics
1 answer:
qaws [65]3 years ago
4 0
-2 1/2 / 6 would be -5/12, just turn - 2 1/2 into a decimal and divide by 6 :)
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Hep asappppppppppppp
schepotkina [342]

Answer:

(6 , -1)

Step-by-step explanation:

2x+  y  = 11   ----------------(I)

y = 11 - 2x --------------------(II)

\frac{1}{2}x - 5y = 8

Multiply the whole equation by 2

2*\frac{1}{2}x -2*5y = 2*8

x - 10y = 16 --------------------(III)

Substitute y = 11- 2x in equation (III)

x - 10(11 - 2x) = 16

x - 110 + 20x = 16

21x - 110 = 16

21x = 16 +110

21x = 126

x = 126/21

x = 6

Plugin x = 6 in equation (II)

y = 11 - 2*6

y = 11 - 12

y = -1

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2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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otez555 [7]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

ppm value = 0.000027 parts per million

Step-by-step explanation:

Given:

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Plugging in the values:

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ppm\,value = ( 1- 0.999972)\\

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3 years ago
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