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2 years ago

8

A group of eight grade 11 and five grade 12 students wish to be on the senior prom committee. The committee will consist of thre

e students. What is the probability that only grade 12 students will be elected, assuming that all students have an equal chance of being elected?

1 answer:

BaLLatris [955]2 years ago

7 0

5/13*4/12*3/11=5/143 I believe

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PLSSS ANSWER, 35 pointss

xxTIMURxx [149]

Answer:

1.

$(y - 5)(x + y)$

2.

${(x - y)}(x - y + a)$

3.

$(b - 3)(5b - 17)$

Step-by-step explanation:

1. The given polynomial is

$x(y - 5) - y(5 - y)$

We need to factor the second part to get:

$x(y - 5) + y(y - 5)$

We factor y-5 to obtain:

$(y - 5)(x + y)$

2. We have

${(x - y)}^{2} - a(y - x)$

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We now factor x-y to get:

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We factor negative 1 from the first part to get

$- 2(b - 3) + 5 {(b - 3})^{2}$

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$(b - 3)( - 2 + 5b - 15) = (b - 3)(5b - 17)$

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Answer:

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Step-by-step explanation:

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