Question 128685
For this problem the information that 
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{{{f(x) = -x -5}}} 
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is extra information that you don't even need.
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You are given:
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{{{g(x) = 2x + 3}}}
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and you are only asked to find {{{g(0)}}}. All this is telling you to do is to go to the equation
for g(x) and in that equation substitute 0 for every x. Then you just simplify it.
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so go to the equation for {{{g(x)}}}:
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{{{g(x) = 2x + 3}}}
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Substitute 0 for every x in this equation and you have:
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{{{g(0) = 2*0 + 3}}}
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The multiplication of 2 times 0 results in zero, so the equation simplifies to:
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{{{g(0) = +3}}}
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and that's the answer for {{{g(0)}}} that you were asked to find.
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Hope this helps you to understand what the problem was asking you to do and to see how to do it.
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