a) Ans;
[tex]f(x) = 2x - 2 \\ \\ f(7) = 2(7) - 2 \\ = 14 - 2 \\ = 12[/tex]
c) Ans;
[tex]f(x) = - 5x - 12 \\ \\ f(7) = - 5(7) - 12 \\ = - 35 - 12 \\ = - 47[/tex]
I hope I helped you^_^
