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77julia77 [94]
3 years ago
15

PLEASE HELP I WILL MARK AS BRAINLIEST

Mathematics
1 answer:
Evgen [1.6K]3 years ago
7 0

Answer:

Should be A.

Step-by-step explanation:

idk how I got it tbh

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Quando existe, dizemos que a solução de um sistema de equações lineares é o conjunto ordenado de números que satisfaz todas as e
QveST [7]
X representa o numero das suas respostas certas.
y represnta o numero das suas respostas erradas.
O total de perguntas <span>é 25, portanto
x + y = 25

Agora tratamos do dinheiro.
Come</span>ça com <span>R$ 500,00
Pelas x respostas certas, recebe 200x.
Pelas y respostas errads perde 150y.
O total de dineheiro inicial mais os ganhos menos as perdas s</span>ão iguais a
R$ 600,00, portanto
500 + 200x - 150y = 600
200x - 150y = 100
20x - 15y = 10

Temos um sistema de duas equações com duas variaveis.

<span>x + y = 25</span>
20x - 15y = 10

      15x + 15y = 375
+    20x - 15y = 10
---------------------------
       35x         = 385
           x         = 11

x + y = 25

11 + y = 25

y = 14

Resposta: Errou 14 perguntas.


5 0
3 years ago
Please help me<br> Sooo confused!!!
SashulF [63]
Well let's say x = -1000
That's what I would do
8 0
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Answer:

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Step-by-step explanation:

........................

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