Three bananas and two pears cost \( £ 2.07 \) Five bananas and three pears cost \( £ 3.33 \) Find the cost of ten bananas and ten pears.

Calaula las saguientes determinantes \( \begin{array}{ll}\text { a) }\left|\begin{array}{cc}-8 & 9 \\ -1 & 20\end{array}\right| & \text { b }\left|\begin{array}{ll}2 & \frac{1}{3} \\ \frac{1}{2} & -1\end{array}\right| \text { c) }\left|\begin{array}{cc}5 & -a \\ 2 a & 4 a^{2}\end{array}\right|\end{array} \)

e) \( \sqrt[2]{2} \cdot \sqrt[2]{18}= \)

If \( 33-a=a+27-5 a \), what is the value of \( 33+3 a ? \)

d) \( \frac{3^{4}: 3}{3^{2}}= \)

Сложите почленно неравенства. \( 11<13 \) и \( 5,1>2,7 \)