## College Algebra (6th Edition)

$x^{40}$
When dividing exponential expressions with the same non-zero base, subtract the exponent of the denominator from the exponent of the numerator: $$\frac{x^{30}}{x^{(-10)}}$$ $$=x^{(30-(-10))}$$ $$=x^{(30+10)}$$ $$=x^{40}$$