If $m*n=n-(m+2)$for any real number m and n find the value of $3*(-5)$

Find to infinity, the sum of the sequence $1,\tfrac{9}{10},{{(\tfrac{9}{10})}^{2}},{{(\tfrac{9}{10})}^{3}}\cdot \cdot \cdot $

The sum of the first n term of the arithmetic progression 5,11,17,23,29,35, –, –,–

Find the range of value for which $3x-7\le 0$ and $x+5>0$

Determine the value of x for which $({{x}^{2}}-1)>0$

W is directly proportional to U. If W =5 when U = 3. Find U when W =$\tfrac{2}{7}$

Which of the following represent the graph above?

A polynomial in x whose roots are $\tfrac{4}{3}$ and $-\tfrac{3}{5}$ is

If $P=\sqrt{\frac{r{{s}^{3}}}{t}},$express r in term of p, s and t

I.  $S\cap T\cap W=S$

II. $S\cup T\cup W=W$

III. $T\cap W=S$

If  $S\subset T\subset W,$which of the above statement are true