Answer:
There are 945 ways to make the pairings
Step-by-step explanation:
Lets pick a team. There are a total of 9 ways to select its pair. Now we have 8 teams remaining, note that the team we picked at the start doesnt matter because it will eventually be picked and the order doesnt matter. From the 8 teams remaining we select one of them and we pick a pair for it; we have 7 possibilities since we hace 7 teams remaining.
From the 6 teams remaining we take one of them and we select its partner, we now have 5 possibilities. From the 4 teams remaining we select one of them and pick 1 of the 3 teams remaining as its pair. Then, we pair the remaining teams.
This gives us a total of 9*7*5*3 = 945 ways to pair the teams.
Don’t know just need points
Answer:
D. (x-6)(x-5)
Step-by-step explanation:
x²-11x+30
x²-6x-5x+30
x(x-6)-5(x-6)
(x-6)(x-5)
6(x^2-1)(6x-1/6(x+1))
On factoring (x^2-1)=(x+1)(x-1)
= 6(x-1)(x+1)(6x-1/6(x+1))
Cancelling (x+1) from numerator and denominator we get,
= 6(x-1)(6x-1)/6
Cancelling 6 we get,
= (x-1)(6x-1)
Answer:
y=-15, y=-2, x=10,x=-5
Step-by-step explanation:
