
Teste
Authored by Sofia Pinto Marinho
Mathematics
8th Grade
18 Questions
Used 48+ times

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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Se 2x + y = - 4 e x + 3y = - 2, então o par ordenado que satisfaz esse sistema é
( - 1 , 0 )
( - 2 , 0 )
( - 1 , 1 )
( - 2 , - 2 )
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Num estacionamento há carros e motas, totalizando 78 veículos. O número de carros é igual a 5 vezes o número de motas. O número de motas no estacionamento é:
65
13
55
11
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A solução do sistema
x + y = 12
x - y = - 2
é:
S={(10,2)}
S={(6,6)}
S={(7,5)}
S={(5,7)}
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Um sumo e um salgadinho custam 2 euros. Dois sumos e um salgadinho custam 3,25 euros. O sumo e o salgadinho custam respetivamente:
1 e 2 euros
0,75 e 1,25 euros
1,25 e 0,75 euros
ambos custam 1 euro
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual dos quatro pares ordenados que se seguem é a solução deste sistema?
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A solução do sistema representado na figura é...
(0,2).
(-2,0).
(1,-1).
(-1,-1).
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A Rita tem 5,50 euros no mealheiro.
No total, tem 17 moedas, sendo umas de 20 cêntimos e outras de 50 cêntimos.
Seja x o número de moedas de 20 cêntimos e seja y o número de moedas de 50 cêntimos que a Rita tem no mealheiro.
Indica qual dos sistemas seguintes permite determinar quantas moedas de 20 cêntimos e quantas moedas de 50 cêntimos tem a Rita no mealheiro.
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