3/x^10 ÷ 9/x^5
= 3/x^10(x^5/9) {when dividing with fractions, multiply by the reciprocal}
= 3x^5/9x^10 {multiplied horizontally through numerators and denominators}
= 1/3x^5 {cancelled 3 and 9....also x^5 and x^10 (left with 3x^5 on bottom} www.algebrahouse.com