I need help

Question 7 (1 point) Given the functions f (ac) = 72 1 72 +3x with the domain {ax # -3 and x * 0} and g (a) = with the domain {ac| > 0}, what is the domain of (f o g) (a)? O a) {axc > 0, x E R } O b) { ac( x * 0, x E R} Oc) {ac| 2 3, x E R} Question 8 (1 point) For the functions f (ac) = 3ac2 - 2ac + 1 and g (ac) = ac2 - ac + 3, (f - g) (ac) would be equal to: Oa) (f - g) (ac) = 42c2 - 20- 2 Ob) (f - g) (20) = 2202 - 20 - 2 O c) (f - g) (20) = 2202 - 320 + 2 O d) (f - g) (20) = 4202 - 32 + 4