hi,
You have to use a formula which is known as of binomial coefficient which is :
k among n is : C ( n /k) = n! / k! ( n-k)!
! = factorial
ex : 5 object among 8 is : C ( 8/5 ) = 8 ! / 5! * ( 8-5) !
As 8! = 8*7*6*5*4*3*2*1 = 40 320
As 5! = 5*4*3*2*1 = 120
as 3 ! = 3*2*1 = 6
then : 40 320 / 120 * 6
40 320 / 720 = 56
Conclusion : there is 56 way to select 5 object among 8 of them.
ps : you can also use Pascal Triangle to do such a thing.
31 is the answer because you would do 5 x 3 an that's 15 and if it's squared u technically add 15 a second time
Consider the form x^2+bx+c. Find a pair of integers whose product is c and whose sum is b. In this case, whose product is -50 and whose sum is -5.
-10,5
Write the factored form using these integers
(x-10) (x+5)
Answer:
45%
Step-by-step explanation:
It is 45% because is 1/4 of the circle
64
5/8= 40. 3/8= 24
1:4 of 40
1= 8. 1*8=8
Answer= 8
