exam Maths Puzzle Numerical Ability

WRITE AN ALEBRAIC EXPRESSION!



THE SUM OF 18 AND A NUMBER

91 MORE THAN THE SQUARE OF A NUMBER


TWO FIFTHS THE CUBE OF A NUMBER

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exam Other Question

I'm not sure where to put this, sorry.
((3^m)(12^(2m+1))* (3^m+1)
Thanks very much!
The demand and supply equations for a certain item are given by
D = -5p + 40
S = -p2 + 30p - 8
Find the equilibrium price.