What is the value of n in the equation –(2n + 4) + 6 = –9 + 4(2n + 1)?

What is the smallest integer n such that n\sqrt{2} is greater than 20

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?