
Uji Pemahaman Aljabar dan Ketaksamaan
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
Radika Dian Dinta
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Selesaikan persamaan linear: 2x + 3 = 11.
5
4
6
3
Answer explanation
Untuk menyelesaikan persamaan 2x + 3 = 11, kurangi 3 dari kedua sisi: 2x = 8. Kemudian bagi kedua sisi dengan 2: x = 4. Jadi, jawaban yang benar adalah 4.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. Analisis ketaksamaan: 5x - 7 < 3.
x = 2
x < 2
x < 0
x > 2
Answer explanation
Untuk menyelesaikan ketaksamaan 5x - 7 < 3, tambahkan 7 ke kedua sisi: 5x < 10. Kemudian bagi kedua sisi dengan 5: x < 2. Jadi, jawaban yang benar adalah x < 2.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Gambarkan grafik fungsi linear: y = 2x + 1.
The slope is -2 and the y-intercept is (0, -1).
The graph of the function y = 2x + 1 is a straight line with a y-intercept at (0, 1) and a slope of 2.
The graph is a parabola opening upwards.
The graph is a horizontal line at y = 1.
Answer explanation
Fungsi linear y = 2x + 1 memiliki kemiringan 2 dan titik potong y di (0, 1). Ini berarti grafiknya adalah garis lurus yang naik, bukan parabola atau garis horizontal.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4. Selesaikan sistem persamaan linear: 2x + y = 10 dan x - y = 2.
(5, 0)
(2, 6)
(4, 2)
(3, 4)
Answer explanation
Untuk menyelesaikan sistem persamaan, substitusi atau eliminasi dapat digunakan. Dari x - y = 2, kita dapatkan y = x - 2. Substitusi ke 2x + y = 10 menghasilkan 2x + (x - 2) = 10, yang menyederhanakan menjadi 3x = 12, sehingga x = 4. Dengan x = 4, y = 2.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5. Selesaikan ketaksamaan: 3x + 4 ≥ 10.
x ≤ 2
x ≥ 2
x < 2
x = 2
Answer explanation
Untuk menyelesaikan ketaksamaan 3x + 4 ≥ 10, kita kurangi 4 dari kedua sisi: 3x ≥ 6. Kemudian, bagi kedua sisi dengan 3: x ≥ 2. Jadi, jawaban yang benar adalah x ≥ 2.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6. Interpretasikan grafik ketaksamaan: y < -x + 5.
The region above the line y = -x + 5, including the line itself.
The area to the right of the line y = -x + 5, excluding the line itself.
The entire plane except for the area below the line y = -x + 5.
The region below the line y = -x + 5, excluding the line itself.
Answer explanation
Grafik ketaksamaan y < -x + 5 menunjukkan area di bawah garis y = -x + 5. Karena tanda kurang dari (<) menunjukkan bahwa garis itu tidak termasuk dalam solusi, maka area yang benar adalah di bawah garis, tidak termasuk garis itu sendiri.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7. Selesaikan sistem bilangan real: x + 2 = 5 dan 3y - 1 = 8.
x = 3, y = 3
x = 5, y = 1
x = 2, y = 4
x = 0, y = 2
Answer explanation
Untuk menyelesaikan x + 2 = 5, kita dapat mengurangkan 2 dari kedua sisi, sehingga x = 3. Untuk 3y - 1 = 8, tambahkan 1 ke kedua sisi, lalu bagi dengan 3, sehingga y = 3. Jadi, x = 3 dan y = 3 adalah jawaban yang benar.
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