Mathematics, 17.10.2020 14:01, gabrielolivas59

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answered: saabrrinnaaa

(10) C (11) D (12) B (13) D (14) C (15) A

Step-by-step explanation:

10) 9x - 1 > 9 - x or 7x - 4 ≥ 4 + 9x

+x +x -9x -9x

10x - 1 > 9 -2x - 4 ≥ 4

+1 +1 +4 +4

10x > 10 -2x ≥ 8

÷10 ÷10 ÷ -2 ↓ ÷ -2

x > 1 or x ≤ -4

11) 7 + 4x < 4x - 7 or -x + 6 > x + 6

-4x -4x -x -x

7 < -7 -2x + 6 > 6

FALSE -6 -6

-2x > 0

÷ -2 ↓ ÷ -2

x < 0

12) |x + 1| = 10

x + 1 = 10 or x + 1 = -10

-1 -1 -1 -1

x = 9 or x = -11

x = {9, -11}

13) 3 - 7 | -1 + 2x| = -116

-3 -3

- 7 | -1 + 2x| = -119

÷ -7 ÷ -7

| -1 + 2x| = 17

-1 + 2x = 17 or -1 + 2x = -17

+1 +1 +1 +1

2x = 18 2x = -16

÷2 ÷2 ÷2 ÷2

x = 9 or x = -8

x = {9, -8}

14) 8 - | 2n - 8 | = 0

-8 -8

- | 2n - 8 | = -8

÷ -1 ÷ -1

| 2n - 8 | = 8

2n - 8 = 8 or 2n - 8 = -8

+8 +8 +8 +8

2n = 16 2n = 0

÷2 ÷2 ÷2 ÷2

n = 8 or n = 0

n = {8, 0}

answered: Guest

answer: f = 32.2m

step-by-step explanation: that is the answer

answered: Guest

no he doesnt because "-16' is negatiive

step-by-step explanation:

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