\[\boxed{\mathbf{1300.еуроки - ответы\ на\ пятёрку}}\]
\[k = \frac{3}{5}.\]
\[x = 9 \cdot \frac{3}{5} = \frac{27}{5} = 5,4.\]
\[y = 4 \cdot \frac{5}{3} = \frac{20}{3} = 6\frac{2}{3}.\]
\[z = 5 \cdot \frac{5}{3} = \frac{25}{3} = 8\frac{1}{3}.\]
\[t = 7 \cdot \frac{3}{5} = \frac{21}{5} = 4,2.\]
\[\alpha = 145{^\circ};\]
\[\beta = 70{^\circ}.\]