31. A student brought concert tickets online. The total cost, c, in dollars, of t tickets can be found using the funtion below c=24.50t+9.5
If the student spent a total of $132 on tickets, how many tickets did he buy?

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?

The anwser cause i do not understand just plez

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick