Question

please help me in this question
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Answer 1

Answer:

$400 \div 105 \: \: \: \: or \: 3.809$

this is answer

Answer 2

Answer:

Sum=

$2 \frac{3}{7} + ( - 5 \frac{4}{7} ) \\ \\ = \frac{17}{7} - \frac{39}{7} \\ \\ = ( \frac{ - 22}{7} )$

Difference =

$\frac{4}{15} - ( \frac{ - 2}{5} ) \\ \\ = \frac{4}{15} + \frac{2}{5} \\ \\ = lcm = 15 \\ \\ = \frac{10}{15}$

Explanation:

Final Difference =

$lcm = 105 \\ \\ = \frac{70 + 245}{105} \\ \\ = \frac{315}{105} \\ \\ = 3$