Acity has 3 new houses for every 7 old houses. if there are 15 new houses in the city, how many old houses are there? a. 37 b. 35 c. 33 d. 38

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 ?

If 25% of y is 30, what is 60% of y?

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left