e values of ' \( a \) ' and ' \( b \) ', for which the equations \( 3 x-(a-1) y=b+7,6 x-(a+4) y=5 b \) - y have infinite solutions, are

5. Rajah di bawah menunjukkan suatu graf fungsi kuadratik yang menyilang paksi-x pada titik \( P \) dan titik \( Q \). Tentukan koordinat bagi titik \( P \) dan titik \( Q \).

\( \left. \begin{array} { l } { 14 . f ( x ) = - 2 x ^ { 2 } + 4 x + 3 } \\ { x } \\ \hline - 2 \\ { - 1 } \\ { - 1 } \\ { 0 } \\ { 1 } \\ { 2 } \end{array} \right. | \)

Solve the equation: \( \sqrt{x + 4} = 6 \)

Find the inverse of the bijective function \( Q F: R \rightarrow \) difined by \( f(x)=2 x+7 \)

There are 56 sheep in a paddock. Each sheep is either white or black. There are 6 times as many white sheep as there are black sheep. How many black sheep are in the paddock?