exam Maths Puzzle Numerical Ability

The demand function for a certain commodity is given by p=80e exponent fraction -q/2 Write q as a function of p

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exam Other Question

Find the equation of the line through (2, -6) that is perpendicular to the line y= -3x +12, and graph the line.
y-(-6) = -3(x-2)
y=-1/2x
**i just wanted to check this one and m
my worksheet says to solve this problem, could you please help me? thank you

3^x=27^(x+1)