21. If the median of \( 33,28,20,25,34 \), and \( x \) is 29 , then find the maximum possible value of \( x \).

Write the following in simplified radical form. \( \sqrt[4]{y^{5}} \)

Identify the solutions of \( 3+4 \sqrt[3]{x^{2}-13}=-5 \). (1 point) \( \begin{array}{l}2 \sqrt{3},-2 \sqrt{3} \\ \sqrt{13},-\sqrt{13} \\ \sqrt{5},-\sqrt{5} \\ \sqrt{21},-\sqrt{21}\end{array} \)

Simplify. \[ \frac{9 x^{5} y^{4}}{45 x^{4} y^{2}} \]

1. Realiza las siguientes multiplicaciones. a. \( \frac{2}{3} x \cdot\left(6 x^{2}-5 x+\frac{1}{2}\right) \) b. \( 5 a \cdot\left(3 a^{2}-2 a b+7 b^{2}\right) \) c. \( (4 m-2 n)(3 m+9 n) \) d. \( (8 x-3)\left(x^{2}-5 x+6\right) \)

Factorise fully \( 2 x^{2}+13 x+15 \)