Line segment AB has endpoints A(7,4) and B(2,5). Find the coordinates of the point that divides the line segment directed from A to B in the ratio of 1:3.

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

Can someone me with my hwplz(only the circled ones)

If the value of cos330°is√3/2 then find cos 165°.