Answer:
153 ways.
Step-by-step explanation:
The answer is the number of combinations of 2 from 18
= 18! / 2! (18-2)!
= 18! / 2! 16!
= 18*17*16! / 2! 16!
= 18 * 17 / 2*1
= 9 * 17
= 153 ways.
Answer:
The 4th system (h = 4.2 − p
; h = 2p)
Step-by-step explanation:
The first one and the last one
Answer:
62.82
Step-by-step explanation:
C=2πA=2·π314≈62.81592cm
Answer:
18 Laptop models were sold.
Step-by-step explanation:
27/3=9
9*2=18