80% of 20 is 80/100 x 20 = 16
So, kelly has used 16 stamps, and has 4 left
First combine like terms:
6n-2n = 4n
7n-2=4n
subtract 7n from both sides
7n-2=4n
-7n -7n
-2=-3n
divide -2 on both sides.
n=1.5
Answer:
bro I thought someone else answered your question
Answer:
what are the choices?
Step-by-step explanation:
Take 3/7 and multiply it by 2 to find out how much she knits in one hour. Then take that value and multiply by 12 to find out how much she knits in 12 hours.
3/7 x 2 = 6/7
6/7 x 12 = 72/7 or 10 2/7.
