

REC 9 ANO 1509
Presentation
•
Mathematics
•
9th Grade
•
Practice Problem
•
Easy
Standards-aligned
ITAMAR CAVALCANTE AGOSTINI
Used 2+ times
FREE Resource
0 Slides • 8 Questions
1
Multiple Choice
Qual é o valor de K = √(x² + 2x + 1) para x = -2?
A) 1
B) -1
C) 2
D) -2
2
Multiple Choice
Qual é o resultado dessa expressão (2 - 1,7)² + (0,4 + 0,5)²?
A) 0,24
B) 0,78
C) 0,90
D) 1,71
E) 2,40
3
Multiple Choice
Qual é o valor numérico da expressão 2x² + 3y + 3 para x = 3 e y = -2?
A) 9
B) 15
C) 20
D) 27
4
Multiple Choice
Dada a expressão: x = -b + √b² - 4ac / 2a, sendo a = 1, b = -7 e c = 1, qual o valor numérico de x?
6,85
2
3
5
5
Multiple Choice
Calcule o número N do sapato de uma pessoa cujo pé mede 24 cm: N = (5P + 28) / 4.
32
37
39
42
6
Multiple Choice
Qual é o valor da expressão (x + y)², para x = 5 e y = 1?
16
-8
16
36
7
Multiple Choice
Calculei o valor de f(-2) se f(x) = x2+ 3.
8
Poll
Quão confiante você se sente sobre esse assunto agora?
Qual é o valor de K = √(x² + 2x + 1) para x = -2?
A) 1
B) -1
C) 2
D) -2
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