17+x=57.
So, subtract 17 from both sides
X=40
Answer:
around 4.52.
Fraction form: 
Step-by-step explanation:
Brainliest?
Answer: 13/12
Step-by-step explanation:
Common denominator:12
9/12 plus 4/12 equals 13/12 equals 1 1/12
Answer:
490
Step-by-step explanation:
<span>When order does not matter you use what is called n choose k formula
n!/(k!(n-k)!) where n is the number of things to choose from and k is the number of choices made, in this case:
20!/(4!(20-4)!)=4845</span>