Какое из приведенных неравенств будет линейным неравенством с одной переменной: \[ \begin{array}{l}\square \text { A) } 5+1<21 \\ \square \text { B) } x \leq 8 \\ \square \text { C) } x+5 \leq y \\ \square \text { D) } x y \leq \frac{4}{5} \\ \square \text { E) } y>13,1 \\ \square \text { F) } 5 x>5\end{array} \]

Find the length of the curve \( x=2 \operatorname{Cos}^{3} \theta y=2 \operatorname{Sin}^{3} \theta \) between the points corresponding to \( \theta=0 \) and \( \theta=\pi / 2 \).

32 What is the simplest form of \( \frac{2 a-(a+b)}{a^{2}-b^{2}} \) ? \( \begin{array}{ll}\text { A } a+b & \text { B } a-b \\ \text { C } \frac{1}{a+b} & \text { D } \frac{1}{a-b}\end{array} \)

Solve the pair of equations simultaneously \[ \begin{array}{r}3 x=3+2 y \ldots \ldots \ldots \\ x+3 y=1 \ldots \ldots\end{array} \]

\( \overline { c } = \frac { 1 } { 400 } ( 1600000 + \frac { 2400000 } { 2 } + \frac { 12400000 } { 3 } ) \)

05) Simplifique as frações algébricas: (a) \( \left(16 x^{5}\right):\left(-4 x^{2}\right) \) (b) \( \left(36 x y^{4}\right):(-6 x y) \) (c) \( (-35 a):(+7 a) \) (d) \( \left(+3 a b^{2}\right):\left(-\frac{10}{5}\right) \) (e) \( \left(-\frac{4}{5} x^{5} y\right):\left(+\frac{4}{3} x^{2} y\right) \)