Question

Помогите пожалуйста да 95 баллов Срочнооооооо

Answer 1

Ответ:

Пошаговое объяснение:

4)

(11 7/15 + х) - 8 7/15 = 6 8/15

11 7/15 + х = 6 8/15 + 8 7/15

11 7/15 + х = 15

х = 15 - 11 7/15

х = 3 8/15

5)

а)

Р = 4а = 4 * 6/7 = 24/7 = 3 3/7

S = a² = (6/7)² = 36/49

б)

Р = 4а = 4 * 15/17 = 60/17 = 3 9/17

S = a² = (15/17)² = 225/289

в)

Р = 4а = 4 * 3 1/8 = 4 * 25/8 = 100/8 = 12,5

S = a² = (3 1/8)² = (25/8)² = 625/64 = 9 49/64

6)

а *( 4 3/4 - b) : 2 1/6 при а = 1 2/13  b= 5 1/2

1 2/13 *(4 3/4 - 5 1/2) : 2 1/6 = - 135/338

1) 4 3/4 - 5 1/2 = 4 3/4 - 5 2/4 = 4 3/4 - 4 6/4 = - 3/4

2) 1 2/13 * (-3/4) = 15/13 *(-3/4) = - 45/52

3) -45/52 : 2 1/6 = - 45/52 : 13/6 = - 45/52 * 6/13 = - 270/676 = - 135/338

Answer 2

Пошаговое объяснение:

№4

(11 7/15 + х) - 8 7/15 = 6 8/15

11 7/15 + х - 8 7/15 = 6 8/15

3 + х = 6 8/15

х = 6 8/15 - 3

х = 3 8/15

№5

S квадрата = а², где а - сторона квадрата

Р квадрата = 4а, где а - сторона квадрата

1) а = 6/7

S = (6/7)² = 6/7 * 6/7 = 36/49

P = 4 * 6/7 = 24/7 = 3 3/7 см

2) а = 15/17

S = (15/17)² = 15/17 * 15/17 = 225/289 см²

Р = 4 * 15/17 = 60/17 = 3 9/17 см

3) а = 3 1/8

S = (3 1/8)² = (25/8)² = 25/8 * 25/8 = 625/64 = 9 49/64 см²

Р = 4 * 3 1/8 = 4 * 25/8 = 100/8 = 12 4/8 = 12 1/2 см

№6

а = 1 2/13; в = 5 1/2

а * (4 3/4 - в) : 2 1/6 =

1 2/13 * (4 3/4 - 5 1/2) : 2 1/6 = -135/388

1) 4 3/4 - 5 1/2 = 4 3/4 - 5 2/4 = 4 3/4 - 4 6/4 = -3/4

2) 1 2/13 * (-3/4) = 15/13 * (-3/4) = -45/52

3) -45/52 : 2 1/6 = -45/52 : 13/6 = -45/52 * 6/13 = -270/676 = -135/338