Question

Can anyone answer this questions pls

Answer 1

$4) \: \: the \: product \: of \: two \: number \: is \: \frac{ - 28}{27} . \\ \: if \: one \: of \: the \: number \: is \: \frac{ - 4}{21} . \\ find \: the \: other \\ \\ solution. \\ let \: the \: number \: be \: x \: \\ \frac{ - 4}{21} \times x = \frac{ - 28}{27} \\ \\ x = \frac{ - 28}{27} \times \frac{21}{ - 4} \\ \\ x = \frac{7}{4} \times \frac{3}{1} \\ \\ x = \frac{21}{4} = 5.25 \: \: is \: the \: answer...$

$3) \: verify \: \frac{3}{7} \times ( \frac{ - 15}{4} + \frac{ - 12}{5} ) = ( \frac{3}{7} \times \frac{ - 15}{4}) + ( \frac{3}{7} \times \frac{ - 12}{5} ) \\ \\ solution. \\ \frac{3}{7} \times ( \frac{ - 75 - 48}{20} ) = \frac{ - 45}{28} + \frac{ - 36}{35} \\ \\ \frac{3}{7} \times \frac{ - 123}{20} = \frac{ - 225 - 144}{140} \\ \\ \frac{ - 369}{140} = \frac{ - 369}{140} \\ \\ \frac{1}{1} = \frac{1}{1} \\ \\ 1 = 1 \: is \: the \: answer...$