The polynomial 7x²_11x+a when divided by (x+1) leaves a remainder of 8.then find value of_5a

A proposal will make years that end in double zeroes a leap year only if the year leaves a remainder of 200 or 600 when divided by 900. Under this proposal, how many leap years will there be that end in double zeroes between 1996 and 2096?

X is a 2-digit number. When X is divided by 5, it has a remainder of 2. Another 2-digit number, Y, when divided by 20, has a remainder of 3. What is the largest possible difference between the two numbers? 

what is the remainder when (x4 + 36) is divided by (x2 – 8)?