Question

Bang tolong jawab ya

Answer 1

Verified answer

Materi: Perbandingan

1) 36 => 60%
x => 76%
berarti,
36/x = 60/76
60x = 36 × 76 = 2736
x = 45,6
So we need to add 45,6-36 = 9,6 ounces of pure silver.

2) Diketahui
p = 6 + l
Misal p×l = A, berarti
(p+3)(l+3) = A + 57
(l + 9)(l + 3) = pl + 57 = (6+l)(l) + 57
l^2 + 12l + 27 = 6l + l^2 + 57
6l = 30
l = 5, which implied to p = 11.
So the dimension of the original size is 11 × 5.