Pls help ASAP i don’t have time!!!!! Pls help ASAP i don’t have time!!!!!
2/7 = x/10
cross multiply:
10 * 2 = 20
7 * x = 7x
7x = 20
x = 2.857
From the second equation we can find that d=43-(9/10)*n
we can put this equation into the first one,
So we have equation 60(43-(9/10)*n)+65n=2800
Solving that we get n=20
60d+65*20=2800
d=25
So the answer is d=25 and n=20
Answer:
D. As the sample size is appropriately large, the margin of error is ±0.15
Step-by-step explanation:
The number of students in the sample, n = 32 students
The percentage of the students that preferred studying abroad,
= 25%
The confidence level for the study = 95%
As a general rule, a sample size of 30 and above are taken as sufficient
The z-value at 95% confidence level, z = 1.96
The margin of error of a proportion formula is given as follows;

Therefore, we get;

Therefore, the correct option is that as the sample size is appropriately large, the margin of error is ±0.15.
F=??
4 vertices mean V=4
6 edges mean E=6
4-6+F=2
-2+F=2
F=4