exam Maths Puzzle Numerical Ability

find the sum on a number line -42+10

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exam Other Question

Please help me :)
Solve for "x":
a) logbasex 4=2 (I think it is x=+-2 or is it just x=2???)
b) logbase9 x=-1/2 ( I think it is x=3 ???)
c) 64(^x-2)=16^1/3 Find the solution of the exponential equation, correct to four decimal places.
e^-4x=6