X²+9x+a has a factor of (x+8) what is the value of 'a' equal to

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%.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)