The square root of 10. The first answer
Answer:
55
Step-by-step explanation:
12 x 5 = 60
60-5 = 55
55 is not prime
We know that
The formula for combinations is
C=n!/[(n-r)!*r!]
where
n is the total number of objects you choose from
r is the number that you choose to arrange
in this problem
n=15 students
r=4 students
C=15!/[(15-4)!*4!]-----> C=15!/[11!*4!]---> (15*14*13*12*11!)/(11!*4*3*2*1)
C=(15*14*13*12)/(24)----->C=1365
the answer is
1365
Supplementary angles
x+20+5x+10=180
6x+30=180
6x=150
x=25
