Answer:
4. 
8. 
10.
×
= 
I've answered 4, 8 and 10 for you as you haven't provided 12, but I hope this helps!! ^-^
Step-by-step explanation:
The perimer of a traingle is the saum of its sides
P = 2(3x+7) + 2(2x+2)
- P= 2(3x+7) + 2*(2x+2) multiply (3x+7) and (2x+2) by 2
- P= 6x+14+4x+4 add the khown values together
- P=6x+4x+18 add the terms with the variable x
- P= 10x+18
4/9
percent = 44%
decimal = 0.4(4 is repeating)