Question

hello guys pls help me to complete my h.w​

Answer 1

Answer:

12. 13/48

13. -144/45

14. -7/3

Answer 2

1.

$\frac{ - 7}{48} - ( \frac{ - 5}{12} )$

$\frac{ - 7}{48} + \frac{5}{12}$

$\frac{ - 7 + 15}{48}$

$\frac{8}{48}$

$\frac{1}{6}$

2.

$\frac{144}{6} \div \frac{ - 9}{13}$

$\frac{144}{6} \times \frac{ - 13}{9}$

$\frac{8}{3} \times \frac{ - 13}{1}$

$\frac{104}{3}$

3.

$\frac{ - 28}{27} \div \frac{4}{9}$

$\frac{ - 28}{27} \times \frac{9}{4}$

$\frac{ - 7}{3}$