document.write( "Question 137469: I have tried solving this question myself without out a book or notes and cannot complete any of the answers, I am looking for an example to follow from and cannot find one so i am hoping this will help. The question is find the domain of the function such as y=the square root of 7x-2. as far as I can tell the problem should come out to be 0 is less than or equal to X which is less than or equal to 2/7. \n" ); document.write( "

Algebra.Com's Answer #100581 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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The question is find the domain of the function such as y=the square root of 7x-2.
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\n" ); document.write( "y = $\"sqrt%287x+-+2%29\"$
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\n" ); document.write( "You know that you cannot have a negative inside the square root:
\n" ); document.write( "You can have 0, however, then y = 0
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\n" ); document.write( "7x - 2 = 0
\n" ); document.write( "7x = 2
\n" ); document.write( "x = 2/7, which is what you had
\n" ); document.write( "therefore the value of x has to be equal or greater than 2/7
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\n" ); document.write( "Domain: x => 2/7
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\n" ); document.write( "A graph would look like this:
\n" ); document.write( " $\"+graph%28+300%2C+200%2C+-4%2C+10%2C+-2%2C+10%2C+sqrt%287x-2%29%29+\"$
\n" ); document.write( "you can see the domain: all real numbers => 2/7; note there are no values less than 2/7 \n" ); document.write( "

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