Which is an equation of the line passing through (-2, 5) perpendicular to the line y = 1/2x+5 Y=2x+1
Y=-2x+1
Y=2x+9
Y=-2x-9

Find the value of the cosine for angle a

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?

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9