Question

Select all the expressions that are equivalent to -6(3x - 7). -18x - 7 4 - 10(3x - 7) 4(3x + 5) - 2(15x - 11) 6(3x + 7) 2x - 7 - 5(4x - 7) -2(9x - 21)

Answer 1

Answer:

Step-by-step explanation:

Things to know

-×-=+

-×+=-

+×-=-

+×+=+

Generally to opening the bracket of the given format

a(b+c). Using distributive law

(a×b)+(a×c)

an+ac

1. -6(3x-7)

Opening the bracket

-18x+42

2. -18x - 7

This is already simplify no need to simplify it.

3. 4 - 10(3x - 7)

Opening the bracket

4-30x+70

-30x+74

4. 4(3x + 5)

Opening the bracket

12x+20

5. - 2(15x - 11)

Opening the bracket

-30x+22

6. 6(3x + 7)

Opening the bracket

18x+42

7. 2x - 7

This is already simplified

8. - 5(4x - 7)

Opening the bracket

-20x+35

9. -2(9x - 21)

Opening the bracket

-18x+42

Only the number 9 is equal to number 1 given.