Math ( Mau mengkoreksi jawaban ku ) Yuk mastah math

Mapel : Matematika
Bab : Campuran

10)

9x - 2y + 4z - 7x - 4y - 5z

= [9x - 7x] + [-2y - 4y] + [4z - 5z]

= 2x - 6y - z

(B)

11)

Model matematikanya :

20.000 - 5x = 2.500

(D)

12)

[tex]2(5x + 2) \leqslant 4(2x - 1)[/tex]
[tex]10x + 4 \leqslant 8x - 4[/tex]
[tex]10x - 8x \leqslant - 4 - 4[/tex]
[tex]2x \leqslant - 8[/tex]
[tex]x \leqslant - 4[/tex]

X kurang dari -4

X = {-4,-5,-6,-7,-8,-9,....}

(C)

13)

A = {3,6,9,12,15,18}
n(A) = 6

Himp bagian = 2^n
Himp bagian = 2^6
Himp bagian = 64

(D)

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Matematika
- Math Lovers

10.

9x - 2y + 4z - 7x - 4y - 5z
9x - 7x - 2y - 4y + 4z - 5z
2x - 6y - z ( b )

11.

20.000 - 5x = 2.500 ( d )

12.

2(5x + 2 ) ≤ 4(2x - 1 )
10x + 4 ≤ 8x - 4
10x - 8x ≤ - 4 - 4
2x ≤ - 8
x ≥ - 4
Maka jawabannya adalah ( d ) { -4 , -3 , -2 , -1 ___ }

13.

A = { x habis dibagi 3 < 21 }
A = { 3,9,12,15,18 }
A = 2^5 = 32 ( b )