Jawaban:

12. x >= 7

13. C

14. 9

15. D. -2 dan 4

16. C. 2

Penjelasan dengan langkah-langkah:

12. 3(2x - 1) >= 5x + 4

6x - 3 >= 5x + 4

6x - 5x >= 4 + 3

x >= 7

13. A = {x| x < 5, x € bilangan asli}

A = {1, 2,3,4}

B = {bilangan prima kurang dr 5}

B = {2,3}

B himpunan bagian dari A ---> opsi C

14. misal jml tdk mengikuti keduanya = x, maka

50 = 32 - 15 + 24 - 15 + 15 + x

50 = 17 + 24 + x

50 = 41 + x

x = 50 - 41

x = 9

15. f(-2) = 8 ---> -2p + q = 8

f(4) = -4 ---> 4p + q = -4

__________ -

-6p = 12

p = 12/-6

p = -2

-2p + q = 8

-2(-2) + q = 8

4 + q = 8

q = 8 - 4

q = 4

16. gradien = m

m = y2 - y1 / x2 - x1

m = 8 - 2 / 5 - 2

m = 6/3

m = 2