Step-by-step explanation:
what is the meaning of ^ this sign
C. 4 because 4 is a perfect square, as well as x^2 and 4x
I hope that helps!
Answer:
x=1 and x=-1/3
Step-by-step explanation:



Therefore, x=1 and x=-1/3
Answer:
d.a cluster sampling
Step-by-step explanation:
This plan exemplifies Cluster sampling. It is a sampling method where populations are placed into different separate groups like here into freshman, sophomore, junior, and senior classes. A random sample of these groups is then selected as here thirty students selected from each group to represent a specific population.<u> It is usually used in that type of research when there is no possible way to find information about a population as a whole.</u>