Write linear function f which f(-1) = 4 and f(3)=0

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar