document.write( "Question 203171: Could you help me with this problem. I don't understand what they are asking me to do. The monthly profit P (in dollars) that Jim makes on the sale of x mobile homes is determined by the formula P=x^2+5x-50. Find the values of x for which Jim makes a profit. \n" ); document.write( "
Algebra.Com's Answer #153290 by ankor@dixie-net.com(22740)\"\" \"About 
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e monthly profit P (in dollars) that Jim makes on the sale of x mobile homes is determined by the formula P=x^2+5x-50. Find the values of x for which Jim makes a profit.
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\n" ); document.write( "A profit is made when P > 0 (positive)
\n" ); document.write( ":
\n" ); document.write( "Solve the equation:
\n" ); document.write( "x^2 + 5x - 50 = 0
\n" ); document.write( "Factor this to
\n" ); document.write( "(x+10)(x-5) = 0
\n" ); document.write( "Two solutions:
\n" ); document.write( "x = 5
\n" ); document.write( "We can say when x > 5, he makes a profit
\n" ); document.write( "and
\n" ); document.write( "x = -10
\n" ); document.write( "We can say when x < -10 he makes a profit
\n" ); document.write( ":
\n" ); document.write( "See if that is true; test it for x=6
\n" ); document.write( "P = 6^2 + 5(6) - 50
\n" ); document.write( "P = 36 + 30 - 50
\n" ); document.write( "P = +16
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\n" ); document.write( "If x = -12
\n" ); document.write( "P = -12^2 +5(-12) - 50
\n" ); document.write( "P = 144 - 60 - 50
\n" ); document.write( "P = +34
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "A graph illustrates this; P is on the y axis
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-16%2C+16%2C+-100%2C+100%2C+x%5E2%2B5x-50%29+\"
\n" ); document.write( "Note the value of P is negative between -10 and + 5 \n" ); document.write( "
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