
simulasi
Authored by Dorkas Rumlia
Mathematics
9th Grade
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35 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Adi menabung sebesar Rp. 2.000.000,- dan setelah beberapa lama uangnya menjadi Rp. 2.160.000,-. Disana ia mendapatkan bunga 12% per tahun. Berapakah lama waktu Adi menabung?
10 bulan
8 bulan
6 bulan
4 bulan
Answer explanation
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan pernyataan berikut.
(i) 36 – x2 = (6+x)(6-x)
(ii) x2 + 2x – 3 = (x-3)(x+1)
(iii) 12y2 – 4y = 4y(3y + 1)
(iv) x2 – 3x – 18 = (x+3)(x-6)
pernyataan yang benar adalah …
(i) dan (ii)
(i) dan (iv)
(i) dan (iii)
(ii) dan (iv)
Answer explanation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika p merupakan penyelesaian dari 3(5x-2) = 5(2x+3) - 6 Nilai dari 4p – 2 adalah …
10
8
6
4
Answer explanation
3(5x-2) = 5 (2x +3) - 6
15x -6 = 10x + 15 - 6
15x – 6 = 10x + 9
15x – 10x = 9 +6
5x = 15
x = 3
x = p = 3
maka 4p-2 = 4(3) – 2 = 12 – 2 = 10
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebuah kolam ikan berbentuk persegi Panjang dengan ukuran panjang (6x+5) meter dan lebar (14x-17) meter. Keliling kolam ikan tersebut tidak kurang dari 156 meter. Jika Panjang kolam ikan dinyatakan dengan p, pertidaksamaan yang tepat untuk Panjang kolam ikan tersebut adalah ..
p > 19
p > 59
p ≥ 59
p ≥ 19
Answer explanation
Model matematika :
Keliling ≥ 156
2[96x + 5) + (4x – 17) ≥156
2 (10x – 12 ) ≥ 156 ( dibagi 2)
10x -12 ≥ 78
10x ≥ 78 + 12
10x ≥ 90
x ≥ 9
Panjang kolam ikan:
p = 6x + 5
p ≥ 6(9) + 5
p ≥ 59
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dalam suatu penelitian 45 ibu-ibu terhadap dua produk sabun, yaitu sabun A dan sabun B. Sebanyak 30 orang menggunakan sabun A, 25 orang menggunakan sabun B, dan 2 orang tidak menggunakan kedua sabun tersebut. Banyak orang yang hanya menggunakan sabun A adalah....
12 orang
14 orang
16 orang
18 orang
Answer explanation
ibu-ibu pengguna sabun A = A
Ibu-ibu pengguna sabun B = B
Banyak ibu yang menggunakan sabun A dan B = x orang.
banyak ibu-ibu yang tidak mengunakan sabun = 2 0rang
A + x + B + 2 = 45
(30-x)+x+(25-x)+2 = 45
30-x+x+25-x+2 = 45
30+25+2-x+x-x = 45
57-x = 45
x = 57-45
x = 12
Banyak ibu-ibu yang hanya menggunakan sabun A adalah: 30-x = 30-12 = 18
Jadi, banyak ibu-ibu yang hanya menggunakan sabun A = 18 orang.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Gradien garis dengan persamaan 2x + 3y = 5 adalah …
5
2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan gambar berikut.
Persamaan garis b adalah …
y – 2x = 2
2y – x = 1
2y – x = 2
2y – x = 1
Answer explanation
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