15 POINTs_ NEED ASAP! Tell whether the following statements are true or false, explain the reasoning.

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?

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)

Select the term that describes the linear portion in this quadratic equation 7x^2-12x+16=0 a) -12x b) 7x^2 c) 16