Find y, if \[ \begin{pmatrix} 5 & -6 \\ 2 & -7 \end{pmatrix} \begin{pmatrix} 5 \\ 2 \end{pmatrix} = \begin{pmatrix} 7 \\ -11 \end{pmatrix} \]

Express the product of 0.00043 and 2000 in standard form.

Solve for x in 8x-2 = 2/25

A man donates 10% of his monthly net earnings to his church. If it amounts to ₦4,500, what is his net monthly income?

A woman bought a grinder for ₦60,000. She sold it at a loss of 15%. How much did she sell it?

Evaluate Log28 + Log216 - Log24

Simplify \( \frac{2\sqrt{2}-\sqrt{3}}{\sqrt{2}+\sqrt{3}} \)

Find the value of 1101112 + 101002

If log7.5 = 0.8751, evaluate 2 log75 + log750