If abc is congruent to dbc the bc bisects the angle acd

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Which expression is equal to (f+g)(x)?