document.write( "Question 830003: A students grades in a course is the average of 4 test grades and a final exam that is worth 3 times as much as each test. Suppose a student has test grades of 91,89,78,92. Write an equation where x is the students grade and y is the students average. I am having a hard time coming up with the answer for why? I don't understand how they got the answer for it. I come close but not exact. \n" ); document.write( "
Algebra.Com's Answer #500288 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "y = (1*91 + 1*89 + 1*78 + 1*92 + 3x)/7
\n" ); document.write( "y = (350 + 3x)/7
\n" ); document.write( "y = (3/7)x + 350/7
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\n" ); document.write( "answer:
\n" ); document.write( "y = (3/7)x + 50
\n" ); document.write( "where:
\n" ); document.write( "x = final exam grade (0 to 100)
\n" ); document.write( "y = course grade (0 to 100)
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\n" ); document.write( "Solve and graph linear equations:
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\n" ); document.write( "Solve quadratic equations, quadratic formula:
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\n" ); document.write( "---
\n" ); document.write( "Solve systems of linear equations up to 6-equations 6-variables:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php \n" ); document.write( "
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