Question

4. Find the multiplicative inverse of (-7)^-2 ÷(90)^-1​

Answer 1

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Answer 2

${ - 7}^{ - 2} \div {90}^{ - 1}$

=$\frac{1}{90 \times ( - 7) 2}$

=$\frac{90}{ - 7} 2$

=$\frac{90}{49}$