Revisão Matemática - Prof. Ana Clara - 9° ano - CSN
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Ana Clara
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20 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Qual das equações abaixo é do segundo grau?
x² + 3x - 1 = x² + 10
x · (x - 5) = 0
0x² + 4x – 3 = 0
2x³ - 8x² - 2 = 0
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O gráfico da equação do 2º grau chama-se:
Reta
Tangente
Círculo
Parábola
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
O valor de delta desta equação é:
0
-9
8
1800
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Sabemos que ao substituir x por por uma das raízes, conseguimos comprovar a igualdade da equação, assim (-2) é uma das raízes da equação x² - 2x - 8= 0?
Verdadeiro
Falso
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Qual o valor do discriminante (Δ) da equação x² - 4x + 8 = 0 ?
Δ = b² − 4ac
Δ = 16
Δ = 0
Δ=−16
Δ=48
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Um entregador cobra R$30,00 por dia de trabalho mais R$2,50 por entrega realizada.
Quantos reais ganhará esse entregador se em um dia fizer 50 entregas?
R$ 100,00
R$ 155,00
R$ 230,00
R$ 300,00
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Um entregador cobra R$ 30,00 por dia de trabalho, mais R$ 2,50 por entrega realizada.
Em um dia em que esse entregador ganhou R$ 172,50 quantas entregas ele fez?
54
55
56
57
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