exam Maths Puzzle Numerical Ability

the demand and supply equations for a certain item are given by
D= -5p+40
s= -p+30p-8
Find the equilibrium price.

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exam Other Question

1. Give thecomplete statement of the zero-Product Property:_______________.
2. Writhe the Quadratic formula____________________.
If a gallon (gal) of water weighs 8.34 pounds (lb), how much does 3.75 gal weigh?
a) 15 lb b) 31.275 lb c) 30.125 lb d) 12.09 lb

Thank you very much