Question

Soal matematika essay tolong dijawab

Answer 1

A.P : (3x-4) 
   L : (X+1)

Rumus Keliling : 
=2(P+L)
=2 ( 3x-4 + x + 1 )
=2 (4x - 3 )
=8x-6

B:
K : 8x-6
34 cm = 8x - 6
8x = 34cm + 6
8x = 40cm
x = 5cm

Luas : P x L
        : (3x - 4 ) ( x+1)
        : (3.5 - 4 ) ( 5 +1 )
        : (15-4) 6
        : 11 . 6
        : 66cm 

Answer 2

Keliling = 2p + 2L
2(3x-4) + 2 (x+1)
= 6×-8 + 2x +2
= 8x-6


k = 36
8x-6= 36
8x = 42
x = 42/8
x =5.25
p = (3x - 4) = 3 x 5.25 -4 = 11.75
l = x + 1 = 5.25 +1 = 6.25

Luas = p.l = 6.25 x 11.7t
= 73. 4375