\[ s = \frac{(n + \delta)k*}{f(k*)} \]
9 plus x equals minus 5
if n=5 r=1 then find ncr
$$\begin{bmatrix} X & 4 & 12 & \\\\ Y & & 36 & 72 \end{bmatrix}$$ DIRECT AND INVERSE PROPORTION TABLES
x plus 4 equals 7
215-149
ascending order 1 2/7 3/2 6/14
7.2×25÷10
ascending order 2/9 1/3 7/6 1/2
