document.write( "Question 818286: The value of mirror exceeding 10 ( meter square ) in area varies directly as the square of its area . Given that a 60 ( meter square ) costs $400 , find the price of a 45 (meter square ) mirror. Answer 225. \n" ); document.write( "
Algebra.Com's Answer #492449 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
v = Ma^2
\n" ); document.write( "M = constant of proportionality for this type of mirror
\n" ); document.write( "---
\n" ); document.write( "400 = M60^2
\n" ); document.write( "M = 400/60^2
\n" ); document.write( "M = 0.111111 $/sq.m
\n" ); document.write( "---
\n" ); document.write( "v = M45^2
\n" ); document.write( "v = (0.111111 $/sq.m) * (2025 sq.m)
\n" ); document.write( "---
\n" ); document.write( "v = $225
\n" ); document.write( "---
\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve quadratic equations, quadratic formula:
\n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php
\n" ); document.write( "---
\n" ); document.write( "Convert fractions, decimals, and percents:
\n" ); document.write( "https://sooeet.com/math/fraction-decimal-percent.php
\n" ); document.write( "---
\n" ); document.write( "Calculate and graph the linear regression of any data set:
\n" ); document.write( "https://sooeet.com/math/linear-regression.php \n" ); document.write( "
\n" );