Question

Nomor 27,28,31 gimana caranya?

Answer 1

Answer 2

Soal no.28
------------------
•%ayam goreng
= 100 - (bakso+sate+roti bakar)
= 100 - (60+10+5)
= 100 - 75
= 15%

•Banyak murid yang menyukai ayam goreng
=Total murid × % ayam goreng/100
=120 × 15/100
= 18 murid

Soal no.31
----------------
Diketahui :
•f (x) = 4x + 3
•f (a) = 7
•f (-2) = b

Ditanya :
• a+b= ?

Jawab :
•f (a) = 4x + 3 = 7
4x = 7-3
x = 4/4
x = 1

•f (-2) = 4 × (-2) + 3 = b
(-8) + 3 = b
b = (-5)

•Maka a+b = 1 + (-5)
= (-4)

Soal no. 27 saya kurang tahu bagaimana caranya....

~Semoga membantu yaaaa :)