For the following problem, do not include a graph. \( 0 \) of \( 1 \) (a) For the parabola \( y = - 4 x ^ { 2 } + 7 x + 1 \) , find the vertex. (b) Does the vertex correspond to the highest point or the lowest point on the graph?  (a) The vertex is \( ( \frac { 7 } { 8 } , \frac { 65 } { 16 } ) \) (Simplify your answer. Type an ordered pair.) (b) Is the vertex the highest point or lowest point on the graph? Lowest point 

23. Find the equation of a line. Whose intercepts on \( x \) and \( y \) axis are 4 and -6 .

vantes: \( A(x)=x^{3}+x^{2}+x-3 \) \( B(x)=(2 x+1)^{3}-(x+1)^{3} \) \( C(x)=8 x^{3}-1+4(2 x-1) \) \( D(x)=9 x^{2}-4-7(3 x-2)(x+1) \) Exercice \( 34: \) Soit \( a \) et \( b \) deux noml non nuls. Calculer \( a^{-2} b\left(a^{2} b^{-1}\right)^{4} a^{-3} b^{2} \)

\( 67.04 cm ^ { 2 } = \frac { \sqrt { 26 a } } { 2 } h \)

13 If \( \frac{a}{b}=\frac{b}{c}=2 \), then \( \frac{a}{c}=\ldots \ldots \ldots \ldots \) \( \begin{array}{lll}\text { (a) } 2 & \text { (b) } 4 & \text { (c) } 6\end{array} \)

\( 67.04 \mathrm{~cm}^{2}=\frac{\sqrt{269}}{2} h \) what is h ?