<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.
Answer:
Step-by-step explanation:
Surface area is pretty synonymous with area.
How much paint is needed to paint the outside of a birdhouse?
Paint is measured in volume, so not surface area
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Since its just the walls its not total surface area, but surface area of the walls.
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water is measured in volume, especially when wanting to fill something.
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Wants to know how much topsoil is needed to FILL the wheelbarrow, filling is volume. So not surface area.
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Not asking to fill the pillowcase, just how much is needed for the thin, one layer thick case. So this is surface area.
The reflected points are (4, -1) and (-2, 6).
Answer:
all work is shown/pictured
Would u mind sending the figure..!please