Answer: 
Step-by-step explanation:
Answer:
Distributive property
Explanation:
You are distributing the 3 to the parenthesis to get 12x+21 =43
C. Yes, because all the rations of y to x are equal to 3 (: hope this helps
Answer:
GCF: 20
Step-by-step explanation:
The thing you want to do is factor both numbers down to their lowest primes.
40:2 * 2 * 2 * 5
60:2 * 2 * 5 * 3
Now underline what is in both sets of primes. I'll bold them. The number that is bolded comes from 2 * 2 * 5 which is 20
The highest common factor is 20