If m =4, n =9 and r =16, evaluate $\tfrac{m}{n}-1\tfrac{7}{9}+\tfrac{n}{r}$

Find the equation whose roots are ¾ and –4

Factorize completely $6ax-12by-9ay+8bx$  

If 2^x = y, find ${{2}^{(2+\tfrac{x}{3})}}$

Given that ${{\log }_{x}}64=3$, evaluate $x{{\log }_{2}}8$  

Find the 7^th term of the sequence 2, 5, 10, 17, 26, _, _, _

If $\frac{{{27}^{x}}\times {{3}^{1-x}}}{{{9}^{2x}}}=1$, find the value of x

A trader bought an engine for 15,000dollars outside Nigeria. If the exchange rate is 0.075dollars to N1.00, how much did the engine cost in naira?

The sum of 11011₂, 11111₂ and 10000₂ is 10m10n0₂, find  the value of m and n

If $\{x:2\le x\le 18;x\in integer\}$and 7 + x = 4(mod 9). Find the highest value of x