Given \( \left(\begin{array}{ll}1 & 6 \\ 7 & 2\end{array}\right)\binom{r}{3}=\binom{y}{y} \). Determine the values of \( r \) and \( y \). \( \begin{array}{ll}\mathbf{A} \quad r=20, y=2 & \text { C } r=4, y=9 \\ \text { B } r=2, y=20 & \text { D } r=9, y=4\end{array} \)

Mathematics 1 If \( x \) varies inversel as the square root of \( y \), when \( x=27, y=9 \) 9 find the equation connecting \( x \) and \( y \) 5 find \( x \) colen \( y=10 \)

\[ (a+b)^{2 n} \] ifadesinin a nin azalan kuvvetlerine göre açlımın- da baştan 5. ve 7. terimlerin katsayılan birbirine eşit ise \( n \) kaçtı?

19. On the set of axes below, draw the graph of the equation \( y=-\frac{3}{4} x+3 \).

If \( x \) varies inversely as square root of \( y \), when \( 27, y=9 \). 1) find the equation connecti \( x \) and \( y \)

81 If the equation \( x^{2}-6 x+9=\mathrm{b} \) has two real distinct roots, then \( \mathrm{b} \in \ldots \ldots . . . \). . \( \begin{array}{llll}\text { (a) } R & \text { (b) }]-\infty, 0] & \text { (c) }]-\infty, 0[ & \text { (d) }] 0, \infty[ \end{array} \)