There were a total of 400 downloads of the 4.4MB and 690 downloads of the 2.7MB
Answer:
Step-by-step explanation:
(a-b)³=a³-b³-3ab(a-b)
(2n-1)³=(2n)³-1³-3(2n)(1)(2n-1)
=8n³-1-12n²+6n
=8n³-12n²+6n-1
Answer:
a) a combination
b) The probability = 1 ÷ [ Number of ways to select the four dancers ]
Step-by-step explanation:
a) Here it is only required to calculate the number of ways to select the four dancers and the order of the dancers is not required i.e not important for us.
Hence, we will use a combination to select 4 out of 22 dancers
i.e ²²C₄
b) Since the dancers selected are 4 predetermined individuals
therefore,
number of ways to select selecting dancers Laura, Matthew, Lakiesha, and Santos will be '1'
Hence,
The probability = 1 ÷ [ Number of ways to select the four dancers ]
= 1 ÷ ²²C₄
It’s 20abcd because the product of 4&5 is 20 and their are no like terms with the letters so you just add them
Step-by-step explanation:
arccos(sin(5π/4))
= arccos(sin(-π/4))
= arccos(-√2/2)
= 3π/4.