Answer:
about 23 minutes
Step-by-step explanation:
(65x35)/(65+35)= 2,275/100= 22.75 minutes (or 23 if rounded)
Answer:
i think you multiply them or add them
Step-by-step explanation:
Answer:
P.y =
Step-by-step explanation:
From the given question, since Jesse sends the email to 4 people and the 4 people rebroadcast it to another 4 persons each. And this process continues for a required or given round x, then this is an example of an exponential function.
Thus, the number of emails sent for a given round can be expressed as;
y =
Therefore, the appropriate answer is y = .
So that for four rounds (x = 4), the number of emails sent can be determined as;
y =
=
y = 256
Answer:
x = 4
Step-by-step explanation:
7x + 8 = 5x + 16
- 8 = - 8
7x = 5x + 8
-5x = -5x
2x = 8
/2 = /2
x = 4
Answer:
31,827 ways
Step-by-step explanation:
Total number of books, n = 18
Number of books to be selected, r = 7
Since, the order of arrangement doesn't matter ;
We use the combination formula :
nCr = n! ÷ (n-r)! r!
18C7 = 18! ÷ 11!7!
18C7 = (18*17*16*15*14*13*12) ÷ (7*6*5*4*3*2*1)
18C7 = 160392960 / 5040
18C7 = 31,827 ways