Y = 9
7y - 10y = -3y
bring down the 9 = -18 so
-3y + 9 = -18
9 - 9 = 0
- 18 - 9 = - 27
- 3y ÷ - 3 = y
- 27 ÷ -3 = 9
therefore y =9
The total number of wrestlers are 6 and each have to wrestle each other wrestler only once.
It means, the first wrestler have 5 opponent, second have 4 opponents , third have three oponenets , fourth have two opponents and the fifth have only one opponent.
So the total number of matches = 5+4+3+2+1 =15
Answer:
i think its A im not sure
Step-by-step explanation:
B= 5,3
c=4,-1
a=2,1
this is the answer to part c
1 worker=1/5 grass per hour
6 workers
number of workers times work each worker does times time needed=total work done
5 times ? times 1=1 lawn
?=1/5 lawn
1 worker does 1/5 lawn in 1hour
6 workers
work is 1/5
time=?
total work=1
6 times 1/5 times ? =1
6/5 times ?=1
times 5/6 both sides
?=5/6
it takes 5/6 hour or 50 minutes