document.write( "Question 771328: The number of years a person born in the United States is expected to live can be approximated by the equation y=0.189x+70.8, where x is the number of years since 1970. Solve this equation for x. Use this new equation to determine in which year the approximate life expectancy will be 80.9 years. \n" ); document.write( "
Algebra.Com's Answer #470123 by oscargut(2103)\"\" \"About 
You can put this solution on YOUR website!
y=0.189x+70.8\r
\n" ); document.write( "\n" ); document.write( "80.9 = 0.189x+70.8\r
\n" ); document.write( "\n" ); document.write( "0.189x = 10.1\r
\n" ); document.write( "\n" ); document.write( "x = 53.4\r
\n" ); document.write( "\n" ); document.write( "Then year is: 1970 + 53.4 = 2023.4\r
\n" ); document.write( "\n" ); document.write( "Answer Year 2023\r
\n" ); document.write( "\n" ); document.write( "You can ask me more at: mthman@gmail.com\r
\n" ); document.write( "\n" ); document.write( "Thanks
\n" ); document.write( "
\n" );