Answer:
The sampling method applied is Cluster sampling.
Step-by-step explanation:
A cluster sampling method is the type of sampling where first the entire population is divided into homogeneous groups. Then a random sample of these groups are selected.
After selecting a sample of groups, a random sample of fixed size is selected from each group.
In this case all freshmen are first divided into 30 sections, then 4 random sections are selected and the students in those 4 sections are sampled.
The sampling method applied is Cluster sampling.
Answer:
B,D
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
x:5 = 18:30
Convert to the least common denominator 6x:30 = 18
:30
Divide each side by 6 6x = 18
x = 3
The number of blue roses will be 72. Then the number of red roses that she have at first is 84.
<h3>What is the linear system?</h3>
A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.
Mrs Fernandez has a total of 156 red and blue roses.
After selling the same number of red and blue roses.
She had 1/3 of the number of red roses and 2/9 of the number of blue roses left.
Let x be the number of red rose and y be the number of blue roses.
Then the equation will be
x + y = 156 ...1
2x/3 = 7y/9
6x = 7y ...2
By solving the equations 1 and 2, we have
x = 84 and y = 72
Then the number of red roses that she have at first is 84.
More about the linear system link is given below.
brainly.com/question/20379472
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Area of the triangle
= 1/2 * base * height
= 1/2 * 8 * 4 = 16 ft^2
