Question

Given that ab= -2/5 , a = -1/8 , find b​

Answer 1

$ab = \frac{ - 2}{5} \: \: \: \: a = \frac{ - 1}{8} \\ a \times b = \frac{ - 2}{5} \\ \frac{ - 1}{8} \times b \: = \frac{ - 2}{5} \\ b \: = \frac{ - 2}{5} \times \frac{ - 8}{1} \\ b = \frac{16}{5}$

:. b = 16/5

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Answer 2

Answer:

b = 16/5

Step-by-step explanation:

$a = \frac{ - 1}{8} \: \: ; \: \: ab = \frac{ - 2}{5} \\ \\ ab = \frac{ - 2}{5} \\ ( \frac{ - 1}{8} ) \times b = \frac{ - 2}{5} \\ b = \frac{ - 2}{5} \div \frac{ - 1}{8} \\ b = \frac{ - 2}{5} \times \frac{8}{ - 1} \\ b = \frac{_{2 \: \: } \cancel{ - 2}}{5} \times \frac{8}{ \cancel{ - 1}_{ \: \: 1}} \\ b = \frac{2}{5} \times 8 \\ \boxed{ b = \underline{ \underline{ \bf \frac{16}{5} }}}$