USING EQUATIONS to solve WORD PROBLEMS Directions: Set up and solve an equation for each problem below. 7. The measure of one angle is str more than half the measure of another angle. If the angles are complementary, find both measures.

Q8) Find the term contains \( x^{4} \) in the expansion of \( \left(x^{2}-\frac{1}{x^{2}}\right)^{12} \) according to the descending powers of \( x \), then find the ratio between the coefficient of this term and the middle term.

\( \left\{ \left. \begin{array} { l } { 2 x - 3 < ( x + 1 ) ^ { 2 } - x ( x - 1 ) } \\ { x + 3 - 2 x \geq 4 } \end{array} \right. \quad [ - 4 < x \leq - 1 ] \right. \)

solve the Pollowing systew using. \( A^{-1} \) \( \begin{array}{l}4 x+2 y-z=5 \\ 3 x-y-z=-2 \\ x+y-z=0\end{array} \)

\( \left[ \begin{array} { c c c } { 4 } \\ { 4 } & { 2 } & { - 1 } \\ { 3 } & { - 1 } & { - 1 } \\ { 1 } & { 1 } & { - 1 } \end{array} \right] * \left[ \begin{array} { c } { x _ { 1 } } \\ { x _ { 2 } } \\ { x _ { 3 } } \end{array} \right] = \left[ \begin{array} { c } { 5 } \\ { x } \\ { - 2 } \\ { 0 } \end{array} \right] \)

\( \begin{array}{ll}\text { Solve for } x: \\ 1.1 .1 & x(x-10)=0 \\ 1.1 .2 & 7 x^{2}-5 x-6=0 \text { (correct to TWO decimal places) } \\ 1.1 .3 & (x+2)(2 x-4) \geq 0\end{array} \)