The curve of the quadratic function \( f: f(\chi)=-a x^{2}+b x+c \) is drawn on the cartesian coordinate and the vertex of the curve is \( (3,1) \), the curve intersects the \( \chi \)-axis twice where \( a, b \), are constants which of the following could be a value of \( c \) \( \begin{array}{lll}\text { (a) }-8 & \text { (b) } 2 & \text { (c) } 3\end{array} \)

\( 1 \leftarrow \quad \begin{array}{l}\text { Solve the system of equations by the substitution method. } \\ \begin{aligned} 4 x+2 y & =-154 \\ x-5 y & =0\end{aligned}\end{array} \)

/Evaluate \( :\left(\frac{4^{-8}}{8^{-4}}\right)^{3 / 4} \)

зАдАнив №1 Считая параметры \( p \) и \( g \) положительными, дополните выражение удвоенным произведением так, чтобы получился полный квадрат суммы положительных чисел, и запишите его: \( 64 p^{2}+\square g^{2}=(\square \) \( )^{2} \)

What should be, subtracted from \( 8 x-3 y+4 \) to get \( 3 x-2 y+4 \).

The cost price of a pen is Rs \( (3 x+5) \) and is selling price is \( \operatorname{Rs}(4 x+3) \) Write the formulato find protit.