Matematika

Pertanyaan

no 13, 16, 20, 21 tolong di jwab skrng ya
makasi^_^
no 13, 16, 20, 21 tolong di jwab skrng ya makasi^_^

0 Comment.

1 Jawaban

  • 13. (5x-4)+(x+3) = 70 ÷ 2
    6x - 1 = 35
    6x = 35+1
    6x = 36
    x = 6
    p = 5(6)-4 = 30-4 = 26 m
    l = 6+3 = 9 m
    Luas = p×l = 26×9 = 234 m2 (jawaban B)

    16. B

    20. 3x + x = 48 ÷ 2
    4x = 24
    x = 24 ÷ 4
    x = 6
    p = 3(6) = 18 m
    l = 6 m
    Luas = p × l = 18 m × 6 m = 108 m2
    jawaban B

    21. B

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