1) 36/b^2 при b = -6, 36/(-6^2) = 36/36 = 1

2) -1.3 - (2.8-3.1) = -1.3 - 2.8 + 3.1 = 3.1 - 4.2 = -1.1

3) s = t * v, v = m + n. Ответ: 3.5(m+n)

4) -3.28 * (-2.5) = 8.2

-5 : (-3) =

5) (-)(-)(-)(-)(-) = -

6) 12.9(3) = 12

7) -1.3(7+4х)-11=-4.5

-9.1-5.2х=6.5

5.2х=-15.6

х=-3

8) (-3.8 + 2) (-1) + 4 : (-1) = = 0.25