The sum of two mixed numbers is 5 3/5 what might the two numbers be show has many different solutions as you can.. i'm stuck

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

This is about circle theorems. someone asap : (

10 points? ? +++ me asap gabriella uses the current exchange rate to write the function, h(x), where x is the number of u.s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a) gabriella averages 7.5 u.s. dollars for every 100 euros. b) gabriella averages 100 u.s. dollars for every 25 euros. c) gabriella can exchange 75 u.s. dollars for 100 euros. d) gabriella can exchange 100 u.s. dollars for 75 euros.