Help!! Due soon will give points

Why do interests rates on loans to be lower in a weak economy than in a strong one

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Interest begins accruing the date of the transaction except for auto loans mortgages credit card cash advances credit card purchases