Question

помогите умоляю,даю 35 балов!!!!!!!!!!

Answer 1

Пошаговое объяснение:

9. а)

$\frac{7}{2} \times \frac{2}{ - 49 } = - \frac{1}{7}$

$\frac{7}{3} \times \frac{ - 18}{19} = - 7 \times \frac{6}{19} = - \frac{42}{19}$

$\frac{13}{3} \times \frac{ - 6}{ - 130} = \frac{1}{5}$

б)

$\frac{13}{3} \times \frac{2}{ - 26} = - \frac{1}{3}$

$\frac{17}{5} \times \frac{ - 15}{34} = - \frac{3}{2}$

$\frac{13}{2} \times \frac{ - 7}{ - 26} = \frac{7}{4}$

10. а)

$- \frac{14}{5}$

$- \frac{28}{3}$

$\frac{25}{3}$

$( - \frac{19}{5} ) \times ( - \frac{9}{4}) = \frac{171}{20}$

б) -2

$14 \times ( - \frac{6}{5} ) = - \frac{84}{5}$

$- 3 \times ( - \frac{16}{7}) = \frac{48}{7}$

$( - \frac{13}{6} ) \times ( - \frac{13}{4} ) = \frac{169}{24}$