Find the value of y for which the expression $\frac{{{y}^{2}}-9y+18}{{{y}^{2}}+4y-21}$is undefined.

The roots of a quadratic equation are$\tfrac{4}{3}$and $-\tfrac{3}{7}$. Find the equation. 

Which of the following number lines illustrates the solution of the inequality $4\le \tfrac{1}{3}(2x-1)<5$?

What sum of money will amount to D10, 400 in 5years at 6% simple interest? 

Simplify $\frac{{{3}^{n-1}}\times {{27}^{n+1}}}{{{81}^{n}}}$ 

On a map, 1cm represent 5 km. Find the area on the map that represents 100km² 

Which of the following is a valid conclusion from the premise

“Nigerian footballers are good footballers”

The distance, d, through which a stone falls from rest varies directly as the square of the square of the time, t, taken. If the stone falls 45 cm in 3 seconds, how far will it fall in 6 seconds.

Simplify $\left( \frac{10\sqrt{3}}{\sqrt{5}}-\sqrt{15} \right)$ 

Simplify $(\tfrac{3}{4}-\tfrac{2}{3})\times 1\tfrac{1}{5}$