Pls, solve the equation:

4(a+5)+3(2a-7)=0

The highest common factor of 132 and 220

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?

Ill mark the brainliest if you me with the these three questions 7,8,9