The GCF of the three terms (9a, -18b and 21c) is 3
Rewrite each of the terms so 3 is a factor
9a = 3*3a
-18b = -3*6b
21c = 3*7c
So we can say...
9a - 18b + 21c = 3*3a - 3*6b + 3*7c
9a - 18b + 21c = 3(3a - 6b + 7c)
Answer: 3(3a - 6b + 7c)
If you distribute outer 3 to each of the inner terms and multiply, you'll get the original expression again.
Answer:
D
Step-by-step explanation:
I took an educated guess, I remember doing this.
Answer: B. 80
Step-by-step explanation:
Solve the equation they've given you:
Answer:
12/7
Step-by-step explanation:
1 x 7= 7, then add 5 because of the denominator. 12/7