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Elanso [62]
3 years ago
5

Factorise the following

Mathematics
1 answer:
Vika [28.1K]3 years ago
3 0
For a), common terms between them are x & y
Thus, xy(3x+5y)

For b), I'm guessing the answer is (m+n)(x+y)
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In a sociology class there are 1414 sociology majors and 1111 non-sociology majors. 33 students are randomly selected to present
saul85 [17]

Answer: 0.4065

Step-by-step explanation:

Given : In a sociology class there are 14 sociology majors and 11 non-sociology majors.

Total students = 14+11=25

Number of  students are randomly selected = 3

Then, the number of ways to select 3 students from 25 students :-

^{25}C_3=\dfrac{25!}{(25-3)!3!}=\dfrac{25\times24\times23\times22!}{22!3!}\\\\=2300

Number of ways to select  at least 2 of the 3 students re non-sociology majors :-

^{14}C_1\times^{11}C_2+^{14}C_0\times ^{11}C_{3}\\\\=(14)\times\dfrac{11!}{2!(11-2)!}+(1)\times\dfrac{11!}{3!(11-3)!}\\\\=(14)(11\times5)+\dfrac{11\times10\times9}{6}\\\\=770+165=935

The probability that at least 2 of the 3 students selected are non-sociology majors will be :-

\dfrac{935}{2300}=0.40652173913\approx0.4065

8 0
3 years ago
Translate this into an equation <br> Seven times the sum of a number and 9 equals 8.
zhenek [66]

Answer:

7(9+n)=8

Step-by-step explanation:

I hope this is right :)))

5 0
3 years ago
I need help with this it’s about Function 8.F.2
Ymorist [56]

Answer:

43

Step-by-step explanation:

3 0
2 years ago
What is The sum of b and 11
max2010maxim [7]
B+11 ? I’m not sure is this high school math ?
6 0
3 years ago
8. Which of the following are equivalent to 50? Select all that apply. A. 10% of 5,000 B. 20% of 250 C. 25% of 200 D. 30% of 150
Alex

Answer:

B. 20% of 250

would be 50

4 0
3 years ago
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