84 divided by 2 is 48
one set of 48-12 is 36
36 students are in the science club
Answer:
49.865%
Step-by-step explanation:
Given that:
μ = 4 ; σ = 1
For x = 4
P(x < 4) :
Z score (x - μ) / σ
P(x < 7) - P(x < 4)
((7 - 4) / 1) - ((4 - 4) / 1)
P(Z < 3) - P(Z < 0)
Usibg the Z probability calculator :
0.99865 - 0.5
= 0.49865
= 0.49865 * 100
= 49.865%
There are 26 letters of the alphabet
you want 6-character passwords without repetitionthe first time you pick a letter, you pick from 26 lettersthe second time you pick a letter, you pick from 25 letters (no repetitions !)the third time you pick a letter, you pick from 24 letters, and so onthe answer is 26*25*24*23*22*21=165,765,600 passwords
Answer:
-4a
Step-by-step explanation:
5a + -9a = -4a
hope this helps
Multiply x/3 by 5
and 2y/5 by 3
to give common denominator of 15
5x/15 + 6y/15
= (5x + 6y) /15
i hope this is what you need
5x + 6y
______
15
