2/9 = ?/81
7/8 = ?/24
2/3 = 8/?
7/10=?/50
solve the following simultaneous equations using matrices
2x+5y=9
x+3y=5
x^{3}+2xyz+yzw=0
x^{2}+y^{2}\left(z+w\right)+xyw=1
yzx+2yzw+w^{3}=-2
x^{2}z+xzw+yz^{2}+w^{2}z=-1
the perimeter of the figure is 52m
what is r=the length of the missing side
x2 – x – a2 – a
3a²b + 6ab + 9b²
3a³b² + 16ab + 8a²b³
