Aschool treasurer purchased jackets for the school store. she used the system of equations below to determine the price for each student jacket, x , and the price for each adult jacket , y. write a system of equations that has the same solution set as the system of equations

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

Evaluate cos2θ for cosθ = square root of 3/2