Christina goes to the market with $50. she buys one papaya for $8 and spends the rest of the money on bananas. each banana costs $6. how many bananas can christina purchase? billy goes to the store. he has $90. he wants to purchase a leather jacket for $45, a hat for $10, and the rest on jeans. each pair of jeans costs $35. how many pairs of jeans can billy purchase?