In this equation, y-4/2=10, would i need to get the same denominator
y-4/2=10/2 = y-2=5?

Find the third,fifth and seventh term sequence described by each rule a(n)=n+1

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?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?