Tolong bantu, POIN BESAR Jangan asal

2.

Nilai Adelia = (19 x 4) + (6 x -2) + (5 x 0)

= 76 – 12 + 0 = 64

Nilai Fani = (24 x 4) + (3 x -2) + (3 x 0)

= 96 – 6 + 0 = 90

Nilai Siska = (26 x 4) + (3 x -2) + (1 x 0)

= 104 – 6 + 0 = 98

Nilai Ranti = (18 x 4) + (9 x -2) + (3 x 0)

= 72 – 18 + 0 = 54

Nilai Zifa = (27 x 4) + (3 x -2) + (0 x 0)

= 108 – 6 + 0 = 102

Terkecil ke terbesar = Ranti, Adelia, Fani, Siska, Zifa

3.

Misalkan

t : luas tanah keseluruhan

i : luas kolam ikan

r : luas tanah yang ditanami rumput

k : luas tanah yang dipasangi keramik

i = 1/4 x t

i = 100

1/4 x t = 100

t = 4 x 100

t = 400

k = t – 1/4t – 7/20t

k = t – (1/4t + 7/20t)

k = t – (5/20t + 7/20t)

k = t – 12/20t

k = 8/20t

k = 8/20 x 100

k = 40m²