Tolong bantu jawab beserta caranya aku tau jawabannya tapi ga tau caranya kumohon ya
Penjelasan dengan langkah-langkah:
1)
3x + 4 < -x + 20
3x – (-x) < 20 – 4
4x < 16
x < 4
HP = {1, 2, 3, 4} (A)
2)
5x + 2 ≥ 4x + 10
5x – 4x ≥ 10 – 2
1x ≥ 8
x ≥ 8
HP = {x ≥ 8, x € Bilangan bulat} (D)
3)
8x ≤ 3x + 30
8x – 3x ≤ 30
5x ≤ 30
x ≤ 6
HP = {x ≤ 6, x € Bilangan prima} (B)
4)
7x + 4 = 6x + 11
7x – 6x = 11 – 4
1x = 7
x = 7 (D)
5)
2(y + 4) = y + 15
2y + 8 = y + 15
2y – y = 15 – 8
1y = 7
y = 7 (B)
6)
p/4 = 12
p = 4 × 12
p = 48 (D)
7) B. 2y² dan -4y²
8)
= (x + 3)(x + 10)
= (x·x)(3·x)(x·10)
= x² + 3x + 10 (B)
9)
Jawaban:
1)
3x + 4 < -x + 20
3x – (-x) < 20 – 4
4x < 16
x < 4
HP = {1, 2, 3, 4} (A)
2)
5x + 2 ≥ 4x + 10
5x – 4x ≥ 10 – 2
1x ≥ 8
x ≥ 8
HP = {x ≥ 8, x € Bilangan bulat} (D)
3)
8x ≤ 3x + 30
8x – 3x ≤ 30
5x ≤ 30
x ≤ 6
HP = {x ≤ 6, x € Bilangan prima} (B)
4)
7x + 4 = 6x + 11
7x – 6x = 11 – 4
1x = 7
x = 7 (D)
5)
2(y + 4) = y + 15
2y + 8 = y + 15
2y – y = 15 – 8
1y = 7
y = 7 (B)
6)
p/4 = 12
p = 4 × 12
p = 48 (D)
7) B. 2y² dan -4y²
8)
= (x + 3)(x + 10)
= (x·x)(3·x)(x·10)
= x² + 3x + 10 (B)
9)
= frac{16 {x}^{5} {y}^{5} }{8 {x}^{3} {y}^{2} }=
8x
3
y
2
16x
5
y
5
= (16 div 8)( {x}^{5 – 3} )( {y}^{5 – 2} )=(16÷8)(x
5−3
)(y
5−2
)
= bold{2 {x}^{2} {y}^{3} : (b)}=2x
2
y
3
(b)