Answer:10x+9
Step-by-step explanation:
First you have to multipy the 3 into the parenthesis using distributive property.
After that you get 3x+9+7x.
Then you get 10x+9 because you can only combine like terms
Answer:
20 ft.
7 ft and 3 ft.
3*2=6
7*2=14
6+14=20.
522
92832-31504=61328...........
