9x - 6 + 3x > 42 i really need to have this answer i am stuck

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible