Respuesta :

Answer:

1. 20x+40

2. 6f+6g

3. 77-28x

Step-by-step explanation:

Use distributive property for all

1) 10(2x+9)-50

20x+90-50

20x+40

2) 6(f+g)

6f+6g

3) 77-28x  

4) 3.2(5w+3)

16w + 9.6

Number 1. 20x+40
And number 3. Is 77-28x