Question 160176
{{{f(x)=system( matrix(2,3,-2x-2,"if",x<4,-4x+5,"if",x>=4) )}}}

Determine {{{f(3)}}} 
a. -3
b. -6
c. -8
d. -14
<pre><font size = 4 color = "indigo"><b> 
Look inside the parentheses of "{{{f(3)}}}"

What is in there?  Answer: 3

Look inside the parentheses of "{{{f(x)}}}"

What is in there?  Answer: x

What does that mean?  Answer: That x is this problem is 3.

Is 3 less than 4 or is 3 greater than or equal 4?  
Answer: 3 is less than 4

Since x, which is 3, is less than 4, then what does this {{{f(x)=system( matrix(2,3,-2x-2,"if",x<4,-4x+5,"if",x>=4) )}}} 
tell you to use, {{{-2x-2}}} or {{{-4x+5}}}? Answer: {{{-2x-2}}}

How do you substitute 3 for x into {{{-2x-2}}}?  
Answer: {{{-2x-2=-2(3)-2=-6-2=-8}}}

Then what is the final answer?  Answer: -8.

Edwin</pre>