Terry's gross pay last year was $39,000. She was paid a 6% commission on sales of $100,000. What was her base salary?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k