If I walk down a hall of 100 lockers and open every one, then walk back down closing every second locker, then walk along again 'toggling' every 3rd locker etc until I'm toggling every 10th locker, how many lockers are left open at the end

In each bouquet of flowers, there are 2 roses and 3 white carnations. complete the table to find how many roses and carnations there are in 2 bouquets of flowers.

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 ?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10