Testul nr 17 PROPORȚII

30 bonus points

8 successes

English

Pregătirea Evaluării Naționale 2020- MATEMATICĂ- Lecția 9

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Question 1 of 10

1. Question
1 points
$\frac{x}{y} = \frac{4}{5}$ . Atunci 10x-8y+5 are valoarea
- 8
- 5
- 10
- 7
Correct

Incorrect
Question 2 of 10

2. Question
1 points
Dacă $\frac{x - 10}{15} = \frac{3}{5}$ . Atunci 2x-5 are valoarea
- 25
- 19
- 33
- 14
Correct

Incorrect
Question 3 of 10

3. Question
1 points
$\frac{a}{3 b} = \frac{5}{9}$ . Atunci $\frac{3 a}{b}$ este egal cu
- $\frac{9}{5}$
- $\frac{5}{3}$
- 15
- 5
Correct

Incorrect
Question 4 of 10

4. Question
1 points
$\frac{2 x - 4}{14} = \frac{5}{7}$ . Atunci x este egal cu
- 2
- 7
- 5
- 4
Correct

Incorrect
Question 5 of 10

5. Question
1 points
$\frac{3 a}{b} = \frac{b}{3}$ . Atunci $2 b^{2} - 18 a + 16$ este egal cu
- 16
- 32
- Nu se poate calcula
- 0
Correct

Incorrect
Question 6 of 10

6. Question
1 points
$\frac{x}{2} = \frac{2}{y}$ . Calculați $\frac{x y}{2}$
- 2
- Alt răspuns
- 4
- 8
Correct

Incorrect
Question 7 of 10

7. Question
1 points
Aflați numărul de forma $a b$ știind că $\frac{a - b}{a + b} = 0, 1 (6)$
- 57
- 12
- Nu există
- 75
Correct

Incorrect
Question 8 of 10

8. Question
1 points
$\frac{a}{b} = \frac{1}{2}, \frac{b}{c} = \frac{2}{3}$ . Atunci $\frac{a}{c}$ are valoarea
- $\frac{3}{5}$
- Nu se poate calcula
- 0,(3)
- 1
Correct

Incorrect
Question 9 of 10

9. Question
1 points
Câte numere de forma $a b$ există, știind că $\frac{2}{a} = \frac{3}{b}$ ?
- Nu există
- 4
- O infinitate
- 2
Correct

Incorrect
Question 10 of 10

10. Question
1 points
$\frac{2 a}{5 b} = \frac{5 b}{2 a}$ . Atunci $\frac{a^{4}}{b^{4}}$ este egal cu
- $\frac{25}{4}$
- $\frac{625}{16}$
- $\frac{2}{5}$
- $\frac{5}{2}$
Correct

Incorrect

Examples of questions from "Testul nr 17 PROPORȚII"

$\frac{a}{b} = \frac{1}{2}, \frac{b}{c} = \frac{2}{3}$ . Atunci $\frac{a}{c}$ are valoarea
$\frac{x}{2} = \frac{2}{y}$ . Calculați $\frac{x y}{2}$
Dacă $\frac{x - 10}{15} = \frac{3}{5}$ . Atunci 2x-5 are valoarea