<PRE><B>Question 818712</B>
This solution shows how to solve these kinds of problems:
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http://www.algebra.com/algebra/homework/word/misc/Miscellaneous_Word_Problems.faq.question.818695.html
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php</PRE>