document.write( "Question 1109716: Johnny invested $20,000. A portion returned 5% and another portion returned 8%. The total interest earned on the investment was $1150. Write a system of equations for this situation and determine how much of the original investment was invested at the 5% rate and how much was invested at the 8% rate.\r
\n" ); document.write( "\n" ); document.write( "Answer: Let x be the amount invested that earned 5% and y be the amount invested that earned 8%. System of equations:
\n" ); document.write( "1st equation:
\n" ); document.write( "2nd equation:
\n" ); document.write( "Solution: x = $ , y = $ .
\n" ); document.write( "
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\n" ); document.write( "Johnny invested $20,000. A portion returned 5% and another portion returned 8%. The total interest earned on the investment was $1150.

\n" ); document.write( "Write a system of equations for this situation and determine how much of the original investment was invested at the 5% rate and how much was invested at the 8% rate.

\n" ); document.write( "Answer: Let x be the amount invested that earned 5% and y be the amount invested that earned 8%.

\n" ); document.write( "System of equations:
\n" ); document.write( "1st equation: says that the total of the two amounts x and y is the total amount invested, which is $20,000.
\n" ); document.write( "2nd equation: says that the total amount of interest -- 5% of x (i.e., .05*x), plus 8% of y (i.e., .08*y) -- is $1150.

\n" ); document.write( "Solution:

\n" ); document.write( "That's for you to do....

\n" ); document.write( " x = $ , y = $ .
\n" ); document.write( "
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