exam Maths Puzzle Numerical Ability

solve for x

log base 2x + log base 2(x-6)=4

my answer was x=2

am I correct?

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exam Other Question

Consider g(x) = x^n + 4x^n - 1; what is the maximum number of turns it can have?
@ The maximum number of turns = n – 1.
a. n – 2
b. n – 1
c. n
d. n + 1
Please help w/pre-test for final.
Find f^-1 (x), if it exists, for f(x) = 6x+5

Find the total amount of money in an account if $8000 was deposited 6 years ago at 2% interest compounded semi-annually.