Tolong pakai Rumus lengkap Bsk di kumpulkan pliesssss

21.
misal : motor = x, mobil = y

2x + 4y = 490 | ×1 |
x + y = 170 | ×2 |

2x + 4y = 490
2x + 2y = 340
--------------------- --
2y = 150
y = 75

x + (75) = 170
x = 170 - 75
x = 95

22.
i.
5² = 3² + 4²
25 = 9 + 16
25 = 25 , siku-siku

ii.
6² = 3² + 5²
36 = 9 + 25
36 > 34 , tumpul

iii.
7² = 5² + 6²
49 = 25 + 36
49 < 61 , lancip

iiii.
10² = 5² + 8²
100 = 25 + 64
100 > 89 , tumpul

23.
*)ini jadi kyk trapesium gt
gambar ndiri ya huehue :v
tar jg paham koo //skipp

20 - 8 = 12

jarak = √12² + 9² = √144 + 81 = √225 = 15 m

ehh maapin jua ya klo kepanjangan n gajelas gt
MAAPIN GAA?!!!
kan jua gajelas lagii, yaaa pokonya

semoga membantu :)