How many even integers greater than two and less then 20 are equal in value to the sum of 2 prime numbers?

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Ivan and jeff buy a package of 8 pens for $4.00. ivan wants 5 of the pens, and jeff wants 3.how much should each student pay?

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?