The determinant of the matrix  \(A = \begin{pmatrix} -2 & 3 & 1 \\ p & 2 & 1 \\ 1 & 4 & 2\end{pmatrix}\) is -5. Find the value of p.

The mean of the numbers 0, x + 2, 3x + 6, and 4x + 8 is 4, find the value of x.

Obtain the equation of a straight line passing through (3, 15) whose slope = 3\(\frac{1}{5}\).

A car dealer bought a used car for ₦270,000 and spent ₦70,000 to refurbish it. He later sold the car for ₦490,000. What was the percentage profit?

Simplify (\(\frac{3}{4} \div 2\frac{1}{4}\)) of 1 \(\frac{7}{11}\) (3 \(\frac{2}{3}\) - \(\frac{15}{6}\))