In the following exercises, determine whether each ordered pair is a solution to the given inequality. 504. Determine whether each ordered pair is a solution to the inequality \( y>x-1 \) : (a) \( (0,1) \) (b) \( (-4,-1) \) (c) \( (4,2) \) (d) \( (3,0) \) (a) \( (-2,-3) \)

386 Indica quale polinomio è ordinato secondo le potenze crescenti della variabile \( x \). \( \square 3 a x^{2}+6 a^{2} x^{3}-7 x^{5}+5 a^{3} x^{4} \) \( \square x^{5}-5 x^{4}+4 x^{3}+3 x^{2} \) \( \square-7 x^{2} y^{3}+\frac{1}{3} x^{3}-2 x y^{4}+\frac{1}{2} x^{4} y \) \( \square-2 x z^{3}+6 x^{2} z^{2}-\frac{3}{4} x^{3}+x^{4} z \)

Simplify the following i) \( \frac{x+5+\frac{4}{x}}{\frac{1-7}{x}+\frac{12}{x^{2}}} \) ii) \( \frac{x+5+\frac{4}{x}}{1-\frac{7}{x}+\frac{12}{x^{2}}} \)

Solve: \( \frac{3}{4}(5 x-4)=\frac{1}{2}(4 x+3) \)

55 Indica quale polinomio è omogeneo. \( \square 5 x^{3} y-6 x^{2} y^{2}+x y^{3}+8 \) \( \square x^{3}+2 x^{2} y-4 x y^{2}-y^{3} \) \( \square 3 a^{4} b-a^{5}+7 a^{2} b^{2}-4 a^{3} b^{2} \) \( \square a x^{4}+10 a^{2} x^{3}-2 a^{3} x^{2}+\frac{1}{2} a^{4} \)

381 Indica i trinomi di grado complessivo 6 e gra- do 4 rispetto alla variabile \( b \). \( \square-5 a^{2} b^{4} c+2 a^{3} b^{3}+a b^{5} c^{2} \) \( \square 2 a^{3} b c-\frac{1}{2} a b^{4} c+3 a^{2} b^{3}+1 \) \( \square-6 a^{2} b^{3} c+4 a^{2} b^{4}-a^{3} b^{2} \) \( \square 8 a b c^{3}-7 a^{2} b^{2} c^{3}+5 b^{4} c \)