Which expression correctly represents “ten times the difference of a number and six”?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Pls brainliest will be awarded if answer is correct