First, subtract the 30 apples sold from 50: 50−30=20. Then add the 20 apples he bought: 20+20=40. Tom now has 40 apples.
Multiply the speed (60 miles per hour) by the time (2.5 hours): 60×2.5=150.
Add the base price of the pizza to the cost of the toppings: 15+(3×2)=21.
Divide the total number of cookies by the number of boxes: 24÷6=6. Each box will contain 6 cookies.
The sequence doubles each time. 32×2=64.