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arsen [322]
3 years ago
14

HELP!

Mathematics
2 answers:
Ber [7]3 years ago
5 0

Answer:

U think the answer is C.

Marianna [84]3 years ago
3 0

Answer:

Number of ways of selecting two students is 15

Step-by-step explanation:

number of ways of selecting n out of r  is given by

n_{C_{r} } =\frac{n!}{r!(n-r)!}

It is given that there are 6 seniors on student council.

2 students are selected for district meeting

So we have  n= 6 and r=2

number of ways of selecting two students =6_{C_{2} }

                                                                       =\frac{6!}{2!(6-2)!}

                                                                       =\frac{6!}{2!4!}=15

So we have number of ways of selecting two students is 15

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Ginny factored 6x2 – 31x – 30 as shown: ac = –180 and b = 31 36(–5) = –180 and 36 + (–5) = 31 6x2 + 36x – 5x – 30 6x(x + 6) – 5(
meriva

Answer:

Ginny made a mistake in step 1 when she identified b = 31. It should be b=-31

Step-by-step explanation:

Ginny factored 6x^2 -31x -30 as shown:

ac = –180 and

b = 31

36(–5) = –180 and 36 + (–5) = 31

6x^2 + 36x – 5x – 30

6x(x + 6) – 5(x + 6)

(x + 6)(6x – 5)

b is the coefficient of x and from the trinomial 6x^2 -31x -30, b=-31.

Therefore Ginny made a mistake in step 1 when she identified b = 31. It should be b = –31.

The correct steps are: 6x^2 -31x -30:

ac = –180 and

b = -31

36(–5) = –180 and -36+5 = -31

6x^2-36x +5x -30  

6x(x-6)+5(x-6)

(x-6)(6x+5)

7 0
2 years ago
Please help me with this​
Vladimir [108]
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3 years ago
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