D , because 28-9=21 and 21=x
Hello here is a solution :
Answer:
5
Step-by-step explanation:
Hence it is correct.. thanks for points.
Answer:
6 2/7
Step-by-step explanation:
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
