Given the two expressions shown below:

square root of 4 plus square root of 25
square root of 4 plus square root of 9

which statement best describes the two expressions?
both are rational.

both are irrational.

a is rational, but b is irrational.

a is irrational, but b is rational.

49xy +34y - 72z. determine the degree of the polynomial

Which is an equation for the nth terms of the sequence 12,15,18,21

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?