Perform the indicated operation. f(a)= a + 4
g(a)=-4a – 2
Find (3 f +g)(-4)
Please help asap !!!

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?

Evaluate the expression. (9 + 5)(3 + 2)0

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.