Question

maths subject help please
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Answer 1

Answer:

1/2-19/21

2/21

will be ur ans

Answer 2

Answer:

$= - \frac{1}{2} + ( \frac{ - 4}{3} + \frac{3}{7} )$

$= - \frac{1}{2} + ( \frac{ - 4}{3} \times \frac{7}{7} + \frac{3}{7} \times \frac{3}{3} )$

$= - \frac{1}{2} + ( \frac{ - 28}{21} + \frac{9}{21} )$

$= - \frac{1}{2} + ( \frac{ - 19}{28} )$

$= - \frac{1}{2} - \frac{19}{28}$

$= - \frac{1}{2} \times \frac{14}{14} - \frac{19}{28}$

$= \frac{ - 14}{28} - \frac{19}{28}$

$= - \frac{33}{28}$

Step-by-step explanation:

Hope it helps you out......