Question

СРОЧНО ПОМОГИТЕ ДАМ 40 БАЛЛОВ

Answer 1

3)

$4m - 5m = (4 - 5)m = - m$

$2y + 3y - 9y = (2 + 3 - 9)y = - 4y$

4)

$- 0.2 \times 39 \times ( - 5) = 1 \times 39 = 39$

$4 \times 29 - 14 \times 29 = 29 \times (4 - 14) \\ = 29 \times ( - 10) = - 290$

5)

$( - 4.2) {}^{2} = 17.64$

$( - 0.8) {}^{ 3} = - 0.512$

6)

$- 1.5a \times ( - 2b) = 3ab$

$- 5x + 3y + 7x - 9y = 2x - 6y$

7)

$- 0.6(x - 3.7) + 0.2(3 x- 5) = \\ - 0.6x + 2.22 + 0.6x - 1 = \\ 2.22 - 1 = 1.22$

Answer 2

Ответ:

Пошаговое объяснение: