Answer:
0.13093
Step-by-step explanation:
Give. That :
Population mean = 40% = 0.4
Sample size (n) = 64
Probability that more than 30 have computer at home
Mean = np = 64 * 0.4 = 25.6
Standard deviation = sqrt(n*p*(1-p)) = 3.919
P(x > 30)
USing the relation to obtain the standardized score (Z) :
Z = (x - m) / s
Z = (30 - 25.6) / 3.919 = 1.1227353
p(Z < 1.122) = 0.13093 ( Z probability calculator)
5x - 15 = 50
Add 15 to both sides
5x = 65
Divide both sides by 5
x = 13
Hope this helped :)
Answer:
9ab+3a
Step-by-step explanation:
2a*3b=6ab
2a*1=2a
a*3b=3ab
a*1=a
adding everything together=6ab+2a+3ab+a=9ab+3a
Answer:
C arithmetic
Step-by-step explanation:
-2,0,2,4,6
To get from the first term to the second term, we add 2
To get from the second term to the third term, we add 2
To get from the third term to the fourth term, we add 2
The common difference is 2
This is an arithmetic sequence.
There is no single number we can multiply by to move from once term to the next, so it is not a geometric sequence.
Answer:
Step-by-step explanation:
Easy way to do this is;
1
8 _
2
8 * 2 = 16
16 + 1 = 17
17/2 = 8 , 1/2
