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salantis [7]
3 years ago
15

Someone help me with this please due tomorrow

Mathematics
1 answer:
Aleks04 [339]3 years ago
6 0
1. (x + 6)(x + -12)
2. (x + 10)(x - 10) = x² - 100
3. (x - 6)(x + 17) = x² + 11x - 102
4. (-x + 8)(x - 5) = -x² + 13x - 40
5. (x + 13)(x + 8) = x² + 21x + 104
6. (x + 2)(x + 7) = x² + 9x + 14

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Complete the two-way frequency table below. The table shows that, of 40 students in a physical education class, 16 play football
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i tried working this out but it doesnt make sense, at least the table doesnt... did you make this question up or get it off of a school assignment??

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4 years ago
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Give a combinatorial proof that if n is a positive integer, then
gregori [183]

The Empire is attacking a Rebel base that is stocked with n X-wings and n Y-wings. The Rebels need to build a fleet consisting of n ships (with at least 1 X-wing), to be led by 1 pilot in an X-wing.

There are \binom n1=n ways of picking the leader, and \binom{2n-1}{n-1} ways of building the rest of the fleet, so there's a total of

n\dbinom{2n-1}{n-1}

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In the other direction, suppose we build a fleet comprising of k X-wings and n-k Y-wings. We have \binom nk ways of picking X-wings and \binom n{n-k} ways of picking Y-wings. Also from the k X-wings we pick 1 to be the leader, which we can do in \binom k1=k ways. So there are

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k\dbinom nk^2

ways of building the fleet with these specifications. Sum over all possible values of k,

\displaystyle\sum_{k=1}^nk\binom nk^2

4 0
4 years ago
a triangle has the following measurements : a=19 b=25 c=31 use the law of cosines to find the missing measurements
Mandarinka [93]
Sides:
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b = 25 m
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yKpoI14uk [10]

Answer:

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eg:........................................................................................it goes on forever even though it stopped here

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A cube has 6 faces. What measure does the expression 6 × 9 describe about the cube?
faust18 [17]

It describes that each face (side)is 9.

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