First you would find 1/3 third of 10.50 and it is 3.5, you would then do 10.50 x 4 since it said 10.50 per half a yard, so you would do times 4 and you would get 42, you would then add 42 + 3.5 which equals 45.5.
Enrique goes for a walk every 3 days, to play his guitar every 8 days and to dance every 12 days. Every how many days do you carry out the three activities?