Answer:
190 possibilities.
Step-by-step explanation:
The problem is called 20 choose 2, given by the formula for combinations
C(20,2) = 20! / (2! (20-2)!) = 190
alternatively, we can reason it this way:
there are 20 choices to choose a captain and 19 choices for an alternate captain for a total of 380 ways.
However, there are 20 choices to choose an alternate captain and 19 choices for a captain for a total of 380 ways.
Since we are essentially double counting every choice of the posts, we need to divide 380 by 2 to get 190 ways.
Answer: -4
Explanation:
f(4) = 4(4) - 20
f(4) = 16 - 20
f(4) = -4
Answer:
y = x + 4
Step-by-step explanation:
Number of gallons still in tank = 4
+ Number of gallons added to tank = <u>x </u>
Total gallons in tank = x + 4
y = x + 4
The best way too solve it is to cross multiply. When you get the answer tell me and I’ll check it
Answer:
I don't know what you think about it is not going to be a great day of school
