tolong dijwb, makasi
14. Jumlah = ( 5 × 140 ) + ( 5 × 145 )
= 700 + 725 = 1.425
Rata-rata = 1.425 ÷ (5+5)
= 1.425 ÷ 10 = 142,5 ( b )
15. 10 × 8 = 6,5 × 4 + w × 6
80 = 26 + 6w
54 = 6w
w =
[tex] \frac{54}{6} = 9 \: (d)[/tex]
sorry telat, semoga membantu
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