It will cost 3 dollars for one pound
Answer: 20x+12
Step-by-step explanation:
Distribute the three: 3(7x+4) will be changed to 21x+12-x
Next group like terms, -x+21x=20x
The new equation will be 20x+12
For 7 i say c
and i don't know 8 sory
Answer:
13. no. the value changes when you solve for them
14. yes identity
15. yes commutative
16. yes commutative
All you have to do is go around and answer questions and you get points I guess