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Angelina_Jolie [31]
2 years ago
9

Which of these systems of equations has no solution? A 3a−5b=12 4a−9b=14 B 3a−5b=14 4a−9b=14 C 4a−9b=12 4a−9b=12 D 4a−9b=12 4a−9

b=14

Mathematics
1 answer:
Paul [167]2 years ago
6 0

Answer:

Step-by-step explanation:

A

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3 years ago
Calcule o valor numérico da expressão a seguir -2/3+1-3/2.8/9​
Zolol [24]

Answer:

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Step-by-step explanation:

Given expression :

\bold {\frac{-2}{3}+ 1 -\frac{3}{\frac{2.8}{9}} }\\

solution:

\Rightarrow \frac{-2}{3}+ 1 -\frac{3}{\frac{2.8}{9}}\\\\\Rightarrow \frac{-2}{3}+ 1 -\frac{3}{\frac{2.8}{\frac{9}{1}}}\\\\\Rightarrow \frac{-2}{3}+ 1 -\frac{3}{2.8} \times \frac{1}{9}}}\\\\\Rightarrow \frac{-2}{3}+ 1 -\frac{1}{8.4}\\\\\Rightarrow \frac{-16.8 + 25.2- 3}{25.2}\\\\\Rightarrow \frac{5.4}{25.2}\\\\\Rightarrow 0.214

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2 years ago
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