document.write( "Question 992550: Jason earned $42 each of the last two weeks, and $58 this week. In order to maintain an average of at least $50 a week, how much must Jason earn this week? \n" ); document.write( "
Algebra.Com's Answer #612174 by macston(5194)\"\" \"About 
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\n" ); document.write( "To average $50 over 4 weeks,
\n" ); document.write( "the sum of his earnings must be:
\n" ); document.write( "4*$50=$200
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\n" ); document.write( "The sum of his earnings the first three weeks was:
\n" ); document.write( "$42+$42+$58=$142
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\n" ); document.write( "So for the fourth week he must earn:
\n" ); document.write( "$200-$142=$58
\n" ); document.write( ".
\n" ); document.write( "ANSWER: he must earn $58 the fourth week to average $50 per week.
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