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3 years ago

PLEASE ill mark brainlist i need help on these

Mathematics

2 answers:

KatRina [158]3 years ago

7 0

Answer:

1. −6x+21

2. −47b+19

3. -6x + 21

4. 5 + 47x

5.−6x+39

Step-by-step explanation:

Anestetic [448]3 years ago

4 0

Answer:

21 - 6x
-47b + 19
13x - 18
5 - 47x
-6x + 39

Step-by-step explanation:

1. 9 - 3(2x - 4)

= 9 - 6x + 12 = 9 + 12 - 6x = 21 - 6x

2. -8(5b + 2) - 7(b - 5)

= -40b - 16 - 7b + 35

= -40b - 7b - 16 + 35

= -47b + 19

3. x - 6(3 - 2x)

= x - 18 + 12x

= x + 12x - 18

= 13x - 18

4. -7x + 5(1 - 8x)

= -7x + 5 - 40x

= -7x - 40x + 5

= -47x + 5

= 5 - 47x

5. x + 4 - 7(x - 5)

= x + 4 - 7x + 35

= x - 7x + 4 + 35

= -6x + 39

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