amelia paid 360 for a watch after he had been allowed a discount 10% discount what was the marked price of the watch? and also put the formula

Which is an equation for the nth terms of the sequence 12,15,18,21

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan 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?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?