La función inversa de \( f(x)=a x+b \), es:

6) \( 30 \% \) of \( 600=\ldots(1.8,18,180,1800) \)

Konstruiere beim Dreieck UVW den Punkt, von dem aus a die Seiten \( u \) und \( v \) unter einem Sehwinkel von \( 90^{\circ} \) ers

Mrs Brown gave \( \frac{4}{7} \) of her money to her son. He spent \( \frac{2}{5} \) of the money on a pair of shoes and the rest on two books that cost \( \$ 18 \) each. How much did Mrs Brown have at first?

\( y=x^{2}+3 x-10 \) and the \( x \)-axis.

\( \begin{array}{ll}\text { 1.1.2 } & 5 x^{2}-5 x+1=0 \text { (correct to TWO decimal places) } \\ \text { 1.1.3 } & x^{2}-3 x-10>0 \\ \text { 1.1.4 } & 3 \sqrt{x}=x-4\end{array} \)