Question

линейные функции) 1) y=-1,5x+8
2) y=-2\3-2
3) y=-2x+3 и y=2x-5
4) y=-4x+8

Answer 1

1)

$y = - 1.5x + 8 \\ 0 = - 1.5x + 8 \\ 1.5x = 8 \\ x = \frac{16}{3} \\ x = 5 \frac{1}{3} = 5.3$

2)

$y = - \frac{2}{3} - 2 \\ y = - \frac{2 + 6}{3} \\ y = - \frac{8}{3} \\ y = - 2 \frac{2}{3} = - 2.6$

3)

$y = - 2x + 3 \\ 0 = - 2x + 3 \\ 2x = 3 \\ x = \frac{3}{2} \\ x = 1 \frac{1}{2} = 1.5$

$y = 2x - 5 \\0 = 2 x - 5 \\ - 2x = - 5 \\ x = \frac{5}{2} \\ x = \frac{1}{2 } = 2.5$

4)

$y = 4x + 8 \\ 0 = 4x + 8 \\ - 4x = 8 \\ x = - 2$