1/4 x 1/4 - 1/4 ÷ 1/4 ÷ 1/4 ÷ 1/4 cuanto es?

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

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

Find the values of y: 3y^3(y^2+ 2/3y)=0