Section: Mathematics

28) Apples cost $x a bag for the first 100 bags a store buys from a wholesaler. All bags bought in addition to the first 100 get a discount of 10%. How much does it cost to buy 150 bags of apples from the wholesaler?

1. $100
2. $140x
3. $145x
4. $150x
5. $100x + $50

Since the first 100 bags cost $x each, the total cost of the first 100 bags is $100x. Since the remaining 50 bags are discounted 10%, each bag costs 90% of $x or $(.90)x and the 50 bags cost $45x. The total cost is $145x.