How can I get ready for a highschool entrance exam. ( Its a test to see if i'm smart enough to be in the highschool ) If someone could tell me stuff is very important to study and stuff that is not so important it would really help. Thank you.

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%