Learning Resources

Investigation 1: Total Earnings & Focus A: Combination by Subtraction

• The path of a ball as it rolls down a ramp and along the floor
• A family's total income consists of the husband's income plus the wife's income
• The area of the classroom to be painted is the area of the walls minus the area of the windows
• Revenue is the product of the unit price and the number sold
• Profit is equal to revenue minus expenses