Simplify: 1/6x + 42 + 2/5x - 8/3 -19 A: 97/30x + 23
B: 21/10x - 23
C: -21/10x + 23
D: 97/30x - 23

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?

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?