# How do you simplify 7b^-1 and write it using only positive exponents?

$\frac{7}{b}$
The definition of negative exponents is this ${a}^{- m} = \frac{1}{a} ^ m$ , so
$7 {b}^{- 1} = 7 \cdot \frac{1}{b} = \frac{7}{b}$