$12.00 per hour plus 10% per hour is how much per hour

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955