exam Maths Puzzle Numerical Ability

Simplify and write the answer with all exponents positive.

(5c -3power d4power/p-2power)-1power (p7power d-1power/c2power)2power

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exam Other Question

I am really stuck on this.

The demand equation for a certain type of printer is given by
D = - 200p + 35,000

The supply equation is predicted to be

S= - p2 + 400p - 20, Solve the inequality. Graph the solution on a number line. x - 3 < 10