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icang [17]
3 years ago
12

Each team in the softball league plays each of the other teams exactly once. If

Mathematics
1 answer:
Aleks04 [339]3 years ago
6 0
<span>Each team in the softball league plays each of the other teams exactly once. For every game, there is 2 team playing. The order is not important because  A vs B is same as B vs A
So you just need to makes a combination of 2 that have a result of 21. If there is t number of teams, the number of matches would be:
tC2 = t!/2!(t-2)! = 21
</span>t! / (t-2)! = 21 *2
(t)(t-1)= 42
t^2 -t -42=0
(t-7)(t+6)
t=7 ; t=-6

Excluding the minus result, you got 7 teams.
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Krystal can wax a floor in 16 minutes. Perry helped her and it took 5.76 minutes. How long would it take perry to do it alone?
finlep [7]
<span>Krystal's rate = 1 floor in 16 min. = 1/16 floors per min.

Working together their rate = 1 floor in 5.76 min. = 1/5.76 floors per min.

We need to determine Perry's rate, so we need to equate their combined rate with the sum of the individual rates.

Let Perry's time = x

In equation form, we can write:
1/16 + 1/x = 1/5.76
Solve for x:

(x+16)/16x = 1/5.76 -> 5.76(x+16) = 16x -> 10.24x = 92.16 -> x = 9

So, Perry would take 9 mins. to do the floor alone.

I hope this helped!
Please Rate & Thank!
Please mark as Brainliest!

Have a wonderful night! : )</span>
8 0
3 years ago
Matt is playing a game. He gains 7 points, loses 10 points, and then loses 8 points. What is his final score? *​
Juli2301 [7.4K]

Answer:

-11

Step-by-step explanation:

7-10-8 = -11

8 0
2 years ago
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Acone has a height of 2.5 in, and a radius of 5 in. What is the volume of the cone? (Use 3.14 for s. Round the answer to two
arlik [135]

Answer:

Step-by-step explanation:

8 0
3 years ago
Help if you know this I need help
Pavel [41]

3/14

[(I just came, Sorry for not giving a explanation)]

6 0
3 years ago
Find the are of this compound shape below *
Alexandra [31]

Answer:

52 cm²

Step-by-step explanation:

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7 0
3 years ago
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