Question

Bantu gan tentang lersamaaan garis yg sejajar, gradien dlll
no25 smpai 30 kalsu ga bisa gpp seterah mau isi yg mana pake cara ya jgn sembarangan! yg sembarangan mudhan ga naik kelas

Answer 1

Verified answer

25) 5y = 4
gradien tdk mempunyai ( C )

26) m = ( y2 - y1 ) / ( x2 - x1 )
m = ( 9 - 17 ) / ( 2 - 4 )
m = - 8 / - 2
m = 4 ( D )

27) y - y1 = m ( x - x1 )
y - 7 = 3 ( x - 6 )
y = 3x - 18 + 7
y = 3x - 11 ( A )

28) m = ( y2 - y1 ) / ( x2 - x1 )
m = ( - 1 + 2 ) / ( 3 - 1 )
m = 1 / 2
subtitusi ke salah satu titik
y - y1 = m ( x - x1 )
y + 2 = ½ ( x - 1 )
y = ½ x - ½ - 2 ( dikalikan 2)
2y = x - 1 - 4
2y = x - 5 ( B )

29) y1 = y2
x + 4 = 2x + 8
x - 2x = 8 - 4
- x = 4
x = - 4
subtitusi ke pers
y = x + 4
y = - 4 + 4
y = 0
ttk potong ( - 4 , 0 ) ( A )

30) y1 = y2
3x + 3 = 2x + 5
3x - 2x = 5 - 3
x = 2
subtitusi ke pers
y = 3x + 3
y = 3(2) + 3
y = 6 + 3
y = 9
ttk potong ( 2 , 9) ( A )