Odpowiedź:
2.
[tex]\left \{ {{x=3y-12} \atop {5(3y-12)-y=4}} \right. \\\left \{ {{x=3y-12} \atop {14y=64}} \right. \\\left \{ {{x=3y-12} \atop {y=\frac{32}{7} }} \right. \\\left \{ {{x=\frac{96}{7}-\frac{84}{7} } \atop {y=\frac{32}{7}}} \right. \\\left \{ {{x=\frac{12}{7} } \atop {y=\frac{32}{7}}} \right.[/tex]
3.
[tex]f(x) = 3x+5\\g(x) = \frac{1}{3}x+5[/tex]
4.
[tex]h(x)=-(x-1)^{2}[/tex]
B
Szczegółowe wyjaśnienie:
