\( 08 \left\{ \begin{array} { l } { 2 x + y = ( x - 1 ) ^ { 2 } - x ^ { 2 } } \\ { x + 2 y = - 1 } \end{array} \right. \)

Solve: \( \frac{16^{x-1}}{4}=64 \)

27 Donat el vector \( \overrightarrow{\mathrm{u}}(-5, k) \), calcula \( k \) de manera que a) \( \overrightarrow{\mathrm{u}} \) sigui ortogonal a \( \vec{v}(4,-2) \). b) el mòdul de \( \overrightarrow{\mathrm{u}} \) sigui igual a \( \sqrt{34} \).

Solve \( \sqrt{2 x}=x-4 \)

[2. Graphs and Functions What is the slope of the line with the equation \( -3 x+4 y=8 \) ? Hint: Use the formula sheet to determine the formula(s) needed to solve the problem. A -3

Read the following description of a relationship: \[ \begin{array}{l}\text { A furniture company plans to have } 19 \text { employees at its corporate headquarters } \\ \text { and } 8 \text { employees at each store it opens. } \\ \text { Let } s \text { represent the number of stores and } m \text { represent the total number of } \\ \text { employees. }\end{array} \] Use the function \( m=8 s+19 \) to find the value of \( m \) when \( s=2 \). \( m=\square \)