Tolong bantu jawab soal matematika 31-32 sama caranya plz kk:)​

Jawaban:

31) h(x) = -4x + 9

=> h(5) = a

h(5) = -4(5) + 9

= -20 + 9

= -11

=> h(b) = 21

-4b + 9 = 21

-4b = 21 – 9

-4b = 12

b = 12/-4

b = -3

dit: a – b?

jawab:

= a – b

= -11 – (-3)

= -11 + 3

= -8 (B)

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32. g(x) = 3x – 7

g(a) = -13, nilai a?

jawab:

3a – 7 = -13

3a = -13 + 7

3a = -6

a = -6/3

a = -2 (C)

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semoga membantu,

met belajar skuy 🙂

Penjelasan dengan langkah-langkah:

31. h(x) = -4x + 9

h(5) = a

h(5) : – 4(5) + 9 = a

h(5) : – 20 + 9 = a

a = – 11

h(b) = 21

h(b) : -4(b) + 9 = 21

h(b) = -4b = 21 – 9

-4b = 12

b = 12/-4

b = – 3

jadi, a – b = -11 – (-3) = -11 + 3 = – 8 (B)

32. g(x) = 3x – 7

g(a) = – 13

g(a) : 3a – 7 = – 13

3a = – 13 + 7

3a = – 6

a = -6/3

a = – 2

jadi, a = – 2 (c)