Answer: 21
Step-by-step explanation: This is a combination of 7 objects taken 5 at a time
nCr = n! / r! * (n - r)!
7C5 = 7! / (5! (7-5)!)
= 7! /(5! 2!)
= (7*6*5*4*3*2*1)
-----------------------
5*4*3*2*1 * 2*1
Canceling
= 7*6/ (2*1)
= 21
Answer:
any picture or can you tell us what the amounts stand for?
,
Step-by-step explanation:
,...
5
since -4 *-2 = 8 and -8+8=0
0*-2=0
0+5=5
Enjoy and it would be good if you gave more points
no because you are not distributing numbers that multiply with each other and form new expressions
