Question

Kak tolong aku no 1 ,2,3,4,5 ya kak

Answer 1

1. misalkan: papan penjepit = x
pensil = y

8x+4y = 80000

Jawaban: D

2. A. persamaan linier 1 variabel
B. persamaan linier 2 variabel
C. persamaan kuadrat 1 variabel
D. persamaan kuadrat dan linier 2 variabel

Jawaban: B

3. x = 2y

x+3y =20
2y+3y = 20
5y = 20
y = 20:5
y = 4

x = 2y
x = 2×4
x = 8

Jawaban: C

4. 2x+y  = 12 | ×3
    3x-5y = 31 | ×2
------------------------
6x+3y  = 36
6x-10y = 62 -
-------------------
13y = -26
y = -26:13
y = -2

2x+y = 12
2x-2 = 12
2x = 12+2
2x = 14
x = 14:2
x = 7

Jawaban: A

5. K = 5A

Jawaban: C