exam Maths Puzzle Numerical Ability

The problem is:

Express the exponential function as log functions:
10^x= 1000

My answer is 3.

10^2x+1 =3

My answer is x=.2385

e^3y=1

My answer is x=.7675

Please and thank you in advance.

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exam Other Question

I have to resolve this by graphing the equations in six different ways. Here they are to see if I am doing them right.
4x+3y=>24
3x+4y=>8
x=>0
y=>0

First I need to eliminat how can I rewrite without parethesis use distribution using mailman property.
3+(+^3+^2-2+1)

how can I simplify this in radical form?
squareroot of 3+2 squareroot of 3=