a clothing factory usses 1275.2 meters of cloth a week to make shirts how much cloth is needed to make 3 3/5 times as many shirts

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5